A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

The mysterious round rocks of Schooner Gulch.

This lesser known Hearst estate is a fairytale village built from the stolen bones of historic European buildings.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

A gigantic, symbolic artwork covers the side of the building.

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.