Baikal Deep Underwater Neutrino Telescope
The Baikal Deep Underwater Neutrino Telescope (BDUNT) (Russian: Байкальский подводный нейтринный телескоп) is a neutrino detector conducting research below the surface of Lake Baikal (Russia) since 2003. The first detector was started in 1990 and completed in 1998.
Source: Wikipedia — Baikal Deep Underwater Neutrino Telescope (CC BY-SA 4.0)