- Discover Germany’s largest dripstone cave and visit the medieval Braunfels Castle on this guided, full-day, small-group tour from Frankfurt. Escape to the town of Attendorn, just south of Dortmund and the Biggesee Reservoir — the site of the famous Atta Cave. Explore the cave, then enjoy a walking tour of nearby Braunfels Castle, one of the oldest fortresses in Germany. See the ruins and its many rooms, including the torture chamber, wine cellar, herb garden and popular German Bell Museum. Transportation and all entrance fees are included.
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