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.

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

Giant marble phalluses on the sacred island of antiquity.

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

A marvel of Byzantine engineering under the streets of Istanbul.

1513 Turkish world map, full of European state secrets and snarky commentary.

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

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Memorial to the father of the Republic of China.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

The once highest point in China blends symbolic design with a kick of adrenaline.

A controversial memorial at the place where Captain Cook met his violent end.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This psychedelic tourist trap is a leisurely descent into madness.

A harrowing trail up a mile-high mountain.

The most famous location in China was home to whole dynasties worth of imperial rulers.

On the Pakistan-India border the militaries perform an elaborate theater of aggression each and every night.

A complex of six forts embedded in the Rajasthan hills.

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

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

A grand example of 19th century Burmese teak architecture, and the most significant of Mandalay's historic buildings.

Gigantic unfinished stupa and the world's 2nd largest bell.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.