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

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Famously misunderstood wonder of the ancient world

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

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

Large miniature theme park with 100-plus models.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The ancient latrines of the Greeks, in all their public glory.

This famous city eluded concrete detection until the early 2000's.