A tiny church on a man-made island in the Adriatic.

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

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

Giant marble phalluses on the sacred island of antiquity.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A marvel of Byzantine engineering under the streets of Istanbul.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

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

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

The world's largest frame offers spectacular views of the city's past and present.

An ancient iron pillar in Delhi that seems to be rustproof.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

Fifteen Jodhpur queens left their handprints before going to their fiery death.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Legend has it a commoner volunteered to be buried alive in the foundation so that the great fortress could be built.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The world's second-largest sundial, made entirely out of stone.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.