The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Giant topiary dog once played a role in a terrorist bomb plot.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A museum and doll store featuring a surreal and super sanitized version of where babies come from.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.