Ottoman stone city below a hilltop castle.
Mud-brick birthplace of the Saudi state.
Grand rock-cut tombs at Paphos.
Pyramidal earthen tomb of the Songhai emperor, bristling with wooden stakes.
Ruins of the legendary ancient city.
Al-Baladโs coral-stone merchant houses with carved wooden balconies, a UNESCO gateway for centuries of Mecca pilgrims.
Ninth-century mosque with the spiralling Malwiya minaret.
A fortified hill inhabited for 5,000 years, its medieval stone ramp and gate towering over the old city.
Ruins of a 4,500-year-old Indus Valley metropolis.
Fifteenth-century royal complex at the heart of Bakuโs walled old city.
Ruins of one of the great Buddhist monasteries of ancient Bengal.
Roman mountain town with some of North Africaโs finest mosaics.
Remarkably intact Roman city in the Aures.
Labyrinthine Swahili trading town of carved doors and spice bazaars.
Granite stelae up to 33 metres tall marking the tombs of the Aksumite kings, near the chapel said to hold the Ark of the Covenant.
Summer palace of stained-glass shebeke windows, built without a single nail.
Thousands of rock engravings up to 40,000 years old.
Ancient fortified towns of the Mzab.
Ottoman-era citadel quarter stacked above the bay of Algiers.
The "Camelot of Africa" โ a walled compound of 17th-century stone castles built by Ethiopian emperors.
Ancient Islamic city of 82 mosques, where hyenas are fed by hand at night.
Birthplace of the Buddha, UNESCO-listed.
15th-century mosque at Bagerhat, UNESCO-listed.
Walk original paving of the Qhapaq รan, the 30,000 km Inca road web that once ran six countries
Fortress on Castle Rock holding the Scottish crown jewels and the one oโclock gun.
19 historic windmills, UNESCO-listed.
Watch the sun rise along the Thirteen Towers of Chankillo, a 2,300-year-old solar calendar in the desert
16th-century castle, UNESCO-listed.
The best-preserved Spanish colonial town in Asia โ cobbled Calle Crisologo, horse carriages and ancestral houses.
One of Europeโs largest castle ruins, sprawled across a travertine hill.
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