A sixth-century monastery on a flat-topped mountain, reached only by climbing a leather rope.
Eighteen storeys cut into volcanic rock, deep enough to hide twenty thousand people and their cattle.
Underground necropolis carved 5,000 years ago — book far ahead.
Vivid 5,000-year-old cave paintings.
The "Manhattan of the Desert", UNESCO-listed.
Sunken Byzantine reservoir under Istanbul, its columns rising from black water.
White travertine terraces and pools.
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