1. The Cappadocia region of Turkey is filled with several, massive underground cities, some of which date back as far as 3000 BCE. A UNESCO World Heritage Site, the region features over 200 underground villages and cities, including the largest, Derinkuyu, which once could house over 20,000 people. While many of these ancient cities are still being unearth, throughout the region, there are numerous modern structures built into caves. One of the most spectacular is the Gamirasu Cave Luxury Hotel, which features 35 restored cave rooms. Nestled in the ancient valley of Ayvali Village, it was converted from an 11th century monastery and includes the well-preserved original artwork. While historic details were retained, modern amenities were added, including Wi-Fi and a heated swimming pool that overlooks the valley. Would you like to stay in this historic, luxury cave hotel which costs around $239/night?