Blizzard Entertainment has been around for about 27 years and has given players hundreds of fond memories. From the rise of the Lich King, to swarms of Zerglings, to the founding of Overwatch. With Blizzard’s love for storytelling and world-building also comes their love for easter eggs and hidden secrets. Who could forget the fantastic dialogue from the characters in Warcraft 3 when players clicked on them a bunch, revealing not only more depth of character but also making players laugh at the more serious moments of the story when a little comedic relief was more than welcome?

With Blizzard Entertainment’s love for secrets also comes their love for introducing little, hidden locations for those daring enough to explore further into the vast worlds given to them. Hundreds of hours have been spent trying to solve the puzzles for hidden locations locked behind doors.

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Take Diablo 3. The world of Sanctuary is home to many angels and demons, and, as players know, ludicrous amounts of loot waiting to be plundered by some lucky adventurer. Who would have known that there was so much tucked away into Diablo 3's world, just waiting to be discovered? There are tons of hidden details for anyone daring enough to look for them. Here's a deeper look into the dark fantasy world of Diablo 3 and its hidden zones.

Updated July 17, 2021 by Russ Boswell: With Diablo 4 approaching sometime (hopefully) in the near future, players are craving a new adventure more than ever. Blizzard has fans anxiously awaiting the next installment in the iconic series but many fans are revisiting Diablo 3 to better prepare for the future. Better yet, new fans are finally entering the dark and gritty ARPG universe. With so much to see and do in Diablo 3, it's easy to understand why players may miss some of Diablo 3's hidden levels. There are many Diablo 3 secrets to uncover, with easter eggs, levels, and loot, waiting to be discovered. To showcase Diablo 3's secrets, and in anticipation of Diablo 4, this guide has been updated for clarity with better photos and information. Veterans and new players to the series should absolutely check out these Diablo 3 secrets.

25 Whimsyshire

Diablo 3 Wurmshyre Cow level player defeating enemies

Truthfully the most terrifying area in all of Diablo 3’s setting, with imposing enemies such as unicorns, teddy bears, and pink flowers. In order to enter into this weird landscape, players have to acquire a black mushroom, Leoric’s shinbone, liquid rainbow, Wirt’s bell, Gibbering gemstone, and the staff of herding. Once players have spent a mass amount of time to get those items, they'll have to have the Staff of Herding in their inventory and head over to the Old Tristin Road. There will be a cow and a portal will open up to the mysterious Whimsyshire.

24 Development Heck

Diablo 3 player standing in the cemetary area

Blizzard Entertainment's clever idea for an end credits scene is found in the Cemetery of the Forsaken as a defiled crypt. Inside players can find enemies with names such as Jay Wilson and other mundane human names.

Finding one's own name or a similar namesake must be quite surprising to players not understanding the gimmick of a hidden end credits area. Blizzard’s innovation never ceases to amuse players with making them end their own employees in a dungeon crawling adventure.

23 Quality Well

Diablo 3 two players stand near a Quality Well

Similar to the defiled crypt with the haunting names, including Max Schaefer, the Quality Well is a dungeon that spawns in the Old Ruins in Tristin Road. Only this time, it’s the Quality Assurance team members. That's one way to get their names in Diablo.

This is another welcomed thank you from those at Blizzard Entertainment. It’s nice seeing those who spent long hours getting the recognition they deserve, even if it's in a way that players have to hunt to find.

22 Leoric's Gardens

Diablo 3 two players race through Leorics Gardens

What makes this area hard to find is that many gamers could play through the entire game and never find it, simply because it’s up to chance if they are actually able to go into the gardens. There are several more areas that are also locked away by chance.

This garden is hidden away and only accessible by a portal generated at random. This particular area is only accessed by adventure mode and whenever players find this portal one of four different bounties will be available to them.

21 Not The Cow Level

Diablo 3 a player enters a portal to Not The Cow Level

Taking a page out of Diablo 2’s secret cow level, the Not The Cow Level can be accessed by finding Herald to the Queen. Defeat her and a portal will open into bovine madness. Watch out for legions of cow-based enemies that will do everything they can do to make sure players don’t want to come back.

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Once inside, there are events where players can fight the Cow Queen while being assaulted with cow-based puns by the ghost of the Cow King.

20 Kanai’s Stomping Grounds

Diablo 3 players finding a portal to Kanai's Stomping Grounds

Just when you thought Blizzard couldn’t add any more cow-based levels. Kanai’s Stomping Grounds can be found in a portal created by King Kanai in the Immortal Throne. Honestly, the added comedic relief to a dark game is very relieving to have.

Within the stomping grounds are a couple of chests, as well as infernal bovine that can be found waiting inside for any adventurer seeking to make a few hamburgers out of that pesky livestock.

19 The Eternal Woods

Diablo 3 two players are running through Eternal Woods

The Eternal Woods are part of the many zones players can find within adventure mode. The woods are relatively small in comparison to most areas, but is home to a few dozen skeleton hordes and hungry yetis, all ready to show their blade or teeth.

To access the Eternal Woods, find the Ruins of Sescheron and head away from the gates. An otherwise passable area, these woods are still home to that sweet, sweet loot that all Diablo players crave.

18 Mysterious Cave

Diablo 3 a player standing in Dahlgur Oasis

If players aren’t looking for it, most will outright miss this cave. Lots of little crannies in this area make this cave easily passable as just another dead end. This mysterious cave can be found in one of two areas in the Dahlgur desert.

Within this mysterious cave, rainbow liquid can be found, which is needed to enter the horrible Whimsyshire level. Blizzard also used number-naming for this cave to add to its mysterious ways.

17 Royal Quarters

Diablo 3 players battling through the Royal Quarters

The personal living quarters of King Leoric and his family members are free to plunder if players can find the way to get into the quarters. Originally obstructed by debris, now cleared away by adventure mode, the home of the former can be found in Leoric’s haunted mansion. There’s not much living in the quarters, honestly.

However, if players can find Queen Asyllan’s ghost, and follow it, they'll be led to some well-deserved loot and a ton of lore to read through.

16 Treasure Realm

Diablo 3 a player battling a Treasure Seeker in the Treasure Realm

This is one of the more satisfying places that players will find themselves wandering into, since it's filled with tons of gold and loot to plunder. The Treasure Realm is called many different things, such as the Vault of Greed’s Realm, and is home to many a treasure goblin and Greed herself. Millions of gold coins are available to those lucky enough to stumble upon this world.

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Players can get into the Treasure Realm by finding a treasure goblin. After the goblin is defeated, there is a small chance of a portal opens into this gold-filled world.

15 Ruins Of Sescheron

Diablo 3 a still of the ruins of Sescheron

These ruins cast a somber mood to any who choose to explore their depths. Filled with tons of barbarian lore and loot, the Ruins of Sescheron can be found in the Arreat crater in act 3. Within the ruins, there can be secret corners hiding hidden loot and riches for those with a keen eye.

There are lots of spooky ghost barbarians found within these ruins, but they are not hostile towards players. Which is good, because the idea of having to defeat hordes of Barbarian Ghosts sounds downright painful.

14 Elder Sanctum

Diablo 3 a player battles through the ruins of sescheron

Deeper within the ghost barbarian-filled ruins of Sescheron is the Elder Sanctum. The sanctum is home to more ghouls of Baal’s army of destruction. Once the mighty capital of the mighty barbarians, now fallen to Baal, not much can be found here but the remains of its former inhabitants.

Players often overlook this place, as it was introduced with adventure mode and it isn’t necessary to complete the story. However, venture deep within and you will find the legendary Kanai’s cube.

13 Immortal Throne

Diablo 3 two players standing before the Immortal Throne

This is a harder-to-reach area than most because there are many steps in order to unlock this zone. Yet another intense area involving Barbarians, the Immortal Throne is the highest honor a barbarian can ever hope to achieve. The immortal throne can be found to the north of Kanai’s cubes vault.

Multiple interactions can take place within the throne room, so players should be sure that the Immortal Throne doesn’t miss their list. It's definitely worth seeing.

12 Greyhollow Island

Diablo 3 a team of players and familiars works through Greyhollow Island

Entirely separate from the main story of Diablo 3, Greyhollow island has its own events, history, and most important of all, loot. The area is accessed during Act 5 of Diablo 3, in the world map. A must-see location for any adventurer.

Greyhollow island is surrounded by myths and legends, with sprawling forests and crashing waves. Many don’t even believe it exists, so it’s the player's job to go and find out the truth once and for all and make it back home alive.

11 Ancient Tower

Diablo 3 two players standing on stairs in the Ancient Tower Grounds

What makes this a must-see tower is the rich history it has, as well as the difficulty getting there. Nereza the demon made her home here, as well as used it for her sacrifices. The Ancient Tower is another sub-zone of Greyhollow.

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This is a multi-leveled structure filled with crazed cultists. On every level of this tower, players can find high-level loot as well as the high cleric’s journals.

10 Guild Hideout

Diablo 3 player running down stairs in Westmarch

Ever wanted to find the secret hideout of thieves and assassins and risk fighting one in the dark, all in the name of loot? The Guild Hideout can only be found in Act V of the game, as well as only in adventure mode. These combined with the vast array of enemies that spawn here make it a high-end zone. Inside this hideout players can find the unique leaders of the guild, waiting for unprepared adventurers to slip up.

9 Shrouded Moors

Diablo 3 player standing with summon in Shrouded Moors

Unlocked in the second act of Diablo 3, the Shrouded Moors are, well, shrouded in mystery. Located in the north, not much is known of these moors. Some remnants of past human settlements can be found here. This being another area that can only be found in adventure mode this makes it another difficult zone to find.

There is something unnatural about the Shrouded Moor, making even the strongest and boldest adventurers feel hesitant. Be careful of what lurks within these moors.

8 Temple Of The Firstborn

Diablo 3 a still from the Temple of the Firstborn

Deep within the Shrouded Moors lies the location where humans first arrived in Sanctuary. In this temple lies many cultists who have done horrible things to humanity. It’s not a very nice place.

This is one of the places locked behind adventure mode. This area is beyond creepy. The literal description of this place is “A place of evil, unlike anything you’ve seen before.” It sounds very inviting, doesn’t it? Only the most fool-hardy of adventurers would ever dare step foot into this disturbing place.

7 Sanctum Of Blood

Diablo 3 a player battles a boss in the Sanctum of Blood

If, for whatever reason, the Shrouded Moors or the Temple of the Firstborn weren’t challenging enough to find and fight through, welcome to the Sanctum of Blood. In the last part of the Temple, the demon Vidian awaits, disguised as the adventure Daivin, to take your powers and use them for its own desires.

This is one of the most difficult places to reach in the game, because it’s at the end of a dungeon as well as being in adventure mode.

6 Nephalem Rifts

Diablo 3 a player standing next to a portal in town

These are a proving ground for the Nephalem, testing their strengths against tons of monsters. These can only be accessed by finding a Nephalem obelisk and using a keystone to venture inside. These are randomly generated dungeons, 10 floors each, getting harder as players progress.

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The chances of finding loot here are very high, and even higher the further players venture into the rifts. Once the rift is complete, a boss will spawn. These rifts can be quite challenging and hard to find for even the most seasoned player.