This black shoreline is made up of exploded lava particles.

Yo, Adrian!

This elaborate towering structure was once famed for its revolutionary height.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A mushroom-shaped outcropping that has come to be the symbol for an entire town.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

The glowing blue Nymphaeum of Emperor Tiberius.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Beautiful views and Roman-style statues on the Italian coast.

The other side is actually green.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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

The world's largest wooden structure.

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.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.