|Renewable?||Can't be destroyed.|
Obelisks are indestructible objects usually found surrounding the Pig King in Sandbox Mode. It is used as a decoration around the Pig King, but it also acts as an indicator of the Sanity level of a player. When the Sanity level is 15% and below, the obelisks around the Pig King change their states: the lowered ones raise, and the raised ones become lowered. A strange Shadow Creature resembling Mr. Skitts briefly appears to raise and lower the Obelisks.
In Adventure Mode, Obelisks act as road barriers, and can be great for many defensive ideas. However, it will be hard to deal with, as you might have to eat a load of raw Green Caps to lower your Sanity and Cooked Green Caps to raise your sanity, and it would take a while to defend against something, like Hounds.
Obelisks may be found in one of two states, depending on the Sanity level of the player: raised and lowered. Obelisks in the lowered state will not act as obstacles in the player's path. Obelisks in the raised state will act as obstacles and the player will need to adjust their Sanity level accordingly in order to lower them again. The player cannot use the Nightmare Amulet's insanity effect to raise or lower the Obelisk
In Adventure Mode the player may encounter Obelisks that will impede their progress if their Sanity level is not in the correct range. In Sandbox Mode they serve as a decoration, which surrounds the Pig King.
- Obelisks were a structure added in the A Little Rain Must Fall update.
|Naturally spawning world objects|
|Plants||Berry Bush • Carrot • Cave Banana Tree • Cave Lichen • Flower (Evil Flower, Fern) • Grass • Light Flower • Lureplant • Mandrake • Mushrooms • Mushtree • Plant • Reeds • Sapling • Spiky Bush • Tree • Totally Normal Tree|
|Mobs and Mob Housing||Beehive • Hound Mound • Pond • Pig House • Pig King • Pig Torch • Rabbit Hutch • Rundown House • Slurtle Mound • Spider Den • Spilagmite • Splumonkey Pod • Tallbird Nest • Walrus Camp • Worm Hole|
|Inanimate||Ancient Pseudoscience Station • Ancient Statue • Basalt• Blueprint • Boulder • Gramaphone • Grave • Harp Statue • Headstone • Suspicious Dirt Pile • Marble Pillar • Marble Tree • Maxwell's Door • Maxwell Statue • Maxwell's Light • Merm Head • Nightmare Light • Nightmare Lock • Nightmare Throne • Obelisk • Ornate Chest • Pig Head • Pillars • Relic • Sinkhole • Skeleton • Stalagmite • Touch Stone • Thulecite Wall|
|Things||Box Thing • Crank Thing • Eye Bone • Metal Potato Thing • Ring Thing • Wooden Thing|