Kola Superdeep Borehole

Russia / Murmansk / Zapolyarnyy /
 science, abandoned / shut down, geology, borewell, closed, tourist attraction
The Kola Superdeep Borehole (KSDB) was the result of a scientific drilling project of the former USSR. The project attempted to drill as deep as possible into the Earth's crust. Drilling began on May 24, 1970 on the Kola Peninsula, using an "Uralmash-4E" and later an "Uralmash-15000" drilling device. A number of boreholes were drilled by branching from a central hole. The deepest, SG-3, was completed in 1989, creating a hole 12,262 metres (40,230 ft or 7.62 mi) deep,[1] the deepest hole ever made by humans.
Wikipedia article: http://en.wikipedia.org/wiki/Kola_Superdeep_Borehole
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Coordinates:   69°23'47"N   30°36'32"E