Laacher See (German pronunciation: [ˈlaːxɐ ˈzeː]) or Laach Lake (in English) is a volcanic caldera lake with a diameter of 2 km (1.2 mi) in Rhineland-Palatinate, Germany, about 24 km (15 mi) northwest of Koblenz and 37 km (23 mi) south of Bonn, and is closest to the town of Andernach situated 8 km (5.0 mi) to the east on the river Rhine. It is in the Eifel mountain range, and is part of the East Eifel volcanic field named Vulkaneifel.