The floor of this spectacular Baroque sanctuary is covered in memento mori.

A square-domed symbol of resilience in the heart of the old Jewish Ghetto.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

A hugely vast Irish landscape of barren rock that stretches for miles.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

This building has survived for more than a century and remains virtually untouched.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

The towering figures were created from the cemetery's fallen old-growth trees.

An ancient cave with connections to the American Revolution.