Espenthor is a place, that before the Treaty of Saint-Germain belonged to Austro-Hungary and was situated in the administrative region Karlsbad.
Espenthor was formerly part of the German Empire. In the German Empire, the place was called Espenthor (Karlsbad-Espenthor). The place is now called Olšová Vrata (Karlovy Vary-Olšová Vr.) and belongs to Czech Republic.