Observation Post Alpha, OP Alpha, or Point Alpha was a Cold War observation post between Rasdorf, Hesse, West Germany and Geisa, Thuringia, East Germany. The post overlooked part of the "Fulda Gap", which would have been a prime invasion route for Warsaw Pact forces had the Cold War erupted into actual warfare. It was abandoned by the military in 1991. Today, the "Point Alpha" memorial commemorates the observation point's four decades of existence. The memorial is dedicated to keeping it and a nearby section of the inner German border as reminders of the division of Germany and the confrontation between NATO and Warsaw Pact in the Cold War.

Geisa is a town in the Wartburgkreis district, in Thuringia, Germany. It is situated in the Rhön Mountains, 26 km northeast of Fulda. The near border with Hesse was the border between West Germany and the GDR during the Cold War. Thus, Geisa was in the East German border restriction area of the former inner German border, which meant that until reunification access to the town was limited. The town is the westernmost municipality in what was formerly East Germany.