Pravcicka Brana is a large natural arch in the Czech Republic, located in the Jetrichov Cliffs of the Erzgebirge Mountains in the northern part of Bohemia near the town of Hrensko. It is just east of the Polish-German-Czech border junction where the Elbe River cuts through the mountain complex. The nearest large city is Dresden, Germany. The span of the arch is 87 feet. Photo courtesy of Gunter Welz, www.archhunter.de.