The Gendarmenmarkt area is Berlin at its ritziest, dappled with luxury hotels, fancy restaurants and bars. The graceful square is bookended by the domed 18th-century German and French cathedrals and punctuated by a grandly porticoed concert hall, the Konzerthaus. It was named for the Gens d’Armes, an 18th-century Prussian regiment consisting of French Huguenot refugees whose story is chronicled in a museum inside the French cathedral. Climb the tower here for grand views of historic Berlin.