Airports of London Heathrow, more than Paris and Frankfurt combined, and Heathrow is the European terminus for 11 of the 25 busiest north Atlantic routes. The busiest long-haul route in the world is between London (Heathrow and Gatwick) and New York (JFK and Newark), with a total of 3,898,460 passengers travelling between the two cities in 2011. Airports of London The metropolitan area of London, England, United Kingdom is served by six international airports and several smaller airports. Together, they make the busiest airport system in the world by passenger numbers and the second-busiest by aircraft movements. In 2016, the six airports handled
Aydıntepe underground city Aydıntepe underground city The Aydıntepe underground city () is an ancient underground city in Aydıntepe district of Bayburt Province, Turkey. It is located northwest of Bayburt beneath a residential area. Discovered by coincidence during excavation works for a building construction in 1988, -to some sources in 1998– the underground city at Aydıntepe features chambers, halls and hallways carved out of volcanic tufa rock formation without using building materials. It is situated under the surface. The chambers and the halls are connected with -wide and -high hallways stretching over about in length. There are eight conical shafts over the hallways, which