The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The palace of the King of Kings, burned by Alexander the Great.

Numerical symbolism abound at East Asia's oldest observatory.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

Thousands of effigies of Buddha watch from caves set high above a legendary river, plus whiskey.

Khmer Rouge's high security prison.

The 10,000 Torii shrine.

A giant bisected onion dome remembers the Iraqis who died in the Iran-Iraq War.

These stairs were built to accommodate royals mounted on elephants.