The Homburg Railway is an 18 km line from Frankfurt am Main to Bad Homburg in the German state of Hesse. It was opened in 1860 as one of the first railway lines in Germany. It is now part of the Rhine-Main S-Bahn line S5 to Friedrichsdorf.

Bad Homburg vor der Höhe is the district town of the Hochtaunuskreis, Hesse, Germany, on the southern slope of the Taunus mountains. Bad Homburg is part of the Frankfurt Rhein-Main urban area. The town's official name is Bad Homburg v.d.Höhe, which distinguishes it from other places named Homburg. The town has become best known for its mineral springs and spa, and for its casino.