These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

A Maori village obliterated by an 1886 volcanic eruption.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Handcrafted thermal spa washes away each night with the tide.

This museum/fur store is devoted to educating guests on how awful opossums can be.

The modern birthplace of Irish freedom.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

The largest tea plantation in Southeast Asia supplies gorgeous vistas alongside tea for the surrounding countries.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The largest known meteorite on Earth was too big to move.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The remains of diamond fever taken over by the desert.

Home of the infamous Rug Man of Doha.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The ancient tomb acts as a calendar that keeps perfect time.

This dangerous-looking suspension bridge may have been too unstable to remain open.