Visit the Hal Saflieni Hypogeum

Megalithic temples older than the pyramids.

White travertine terraces and pools.

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.

Boulder-strewn ruins of the Vijayanagara empire along the Tungabhadra river.