Frommer's Review
Carved into a uniquely pink tufa, Zelve was once home to one of the largest communities in the region, inhabited by a Greek population until the 1922 population exchange, when Greeks and Turks were "repatriated" to their mother countries. When Muslims took over the valley, a mosque was hewn out of the rock, and stands near the entrance.
The first known inhabitants of the valley were monks, and although we can say for sure that they carved out the chapels, it's unclear who first began hollowing out the valley. The cave dwellings were used by local villagers up until 1952, when the structures were determined to be unsafe and the villagers were moved en masse over to nearby Aktepe, or New Zelve.
Now a national park, Zelve consists of three consecutive valleys whose walls are riddled with living quarters, blind tunnels, passageways, and traps for protection against attacks. Footholds chiseled into the smooth vertical tufa require an agility once aimed at keeping out unwanted visitors, but now present a fantastic challenge to modern-day rock climbers. Those interested in hiking should set aside plenty of time to explore the area, following a path over the mountain to Red Valley, about 4km (2 1/2 miles) away. Exploring the caves can be exhilarating, challenging, and downright dangerous. Don't attempt anything fancy without a guide; Argeus offers excellent guided tours, but you can also arrange one through one of the many shops in town.
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