The home of the artist credited with introducing the tomato to the American diet.

The world's largest church atop a political fault line.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Overlooking the harbor is a beautiful neglected mansion guarded by two Egyptian sphinxes.

Poseidon? No one seems to know.

Where commuters walk through remnants of an ancient Greek necropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This legendary city has been a tourist attraction for centuries.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The hallucinogenic center of the ancient world.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Ancient paintings known as the "Sistine Chapel of Cave Art."

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.