World's Most-Visited Ancient Ruins
Greg Balfour Evans / Alamy
No. 10 Hierapolis, Turkey
Annual Visitors: 1.6 million
The brilliant-white, terraced pools of the Pamukkale “cotton palace” hot springs have lured people to this area for well over two millennia and are the reason the Greco-Roman town of Hierapolis exists. Built just above the half-mile-wide, 65-foot-tall travertine wonder in 190 B.C., this ancient “spa town” has ruins of temples, a well-preserved theater, and a Sacred Pool where visitors float above broken Roman columns.
Source: Turkish Ministry of Tourism & Culture