Sightseeing
- Schloss Braunfels: The last makeover, which defines the Schloss as it is seen today, took place starting in 1880, and was undertaken according to neo-Gothic plans by building master Edwin Oppler. Many works of art are to be found in the Schloss. Besides works by the Dutch Masters, among them van Eyck, are works by the Hessian Tischbein family of painters, the historically important Altenberg Altar, parts of which are found in the Städel in Frankfurt and the Bavarian National Museum in Munich, and Saint Elizabeth's legendary ring. Places worth visiting include the courtyard, the knights' hall, the guest rooms and painting gallery, the sacral exhibition pieces from the Altenberg Monastery, the hunting paintings by Johannes Deiker, and the cannon square. Other things to visit are the Princely Family Museum and the castle church with displays about the church's building history.
- Old Town: The inner Old Town has distinctive defensive features. There are a Baroque expansion with a marketplace and great spa gardens.
- Dr. Kanngießer'sches Waldmuseum (a whimsical museum)
- Stadtmuseum Obermühle, a museum of local history, built in a former mill.
- Burg Philippstein: These castle ruins lie on a slope and are separated from the surrounding mountainside by a dry moat, although nowadays this is partly filled in. Still preserved are the round keep, remains of the cellar and parts of the surrounding wall.
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