26. The Eye of God
Hundreds of hexagonal stone columns, colored white, black, or blue near their tops, sit in an ancient valley that has been carved out by the flow of magma untold eons ago. At the bottom of the valley, the columns are a mere curiosity that form a small maze; however, when viewed from the top of the valley, at the proper angle, their true nature becomes apparent.
When viewed properly, the columns take on the perfect appearance of a human eye.
27. Passage From Genesis
This massive aqueduct once served a city now long-dead; cool, clear water still flows freely, despite there being no source of water anywhere near the aqueduct.
No tree could possibly be this large, right? Right? Yet, here you are. The air is always clean and easy to breathe within Yggdrasil's canopy, and it's rumored that not all of the tree's roots are on the Material Plane. Clever adventurers have been able to trace the roots to the Elemental Planes, Mechanus, Nirvana, Elysium, and even Sigil.
Also, I'm amazed Chrome actually recognized "Yggdrasil."