Visit the Plain of Jars

Ruined stone city built on coral islets.

Hundreds of standing stones (tazunu) scattered across the savanna near Bouar, raised by an unknown culture thousands of years ago.

Ancient stone trilithon, "Pacific Stonehenge".

Ruined former Siamese capital, UNESCO-listed.

The "museum without walls": grassy royal burial mounds, the Cheomseongdae observatory and Silla-dynasty treasures across the town.

Ceremonial capital of the Persian Empire.

Xi'an's buried army of clay warriors.

Rock-cut cave temples in Maharashtra, crowned by the monolithic Kailasa temple.