Tschamberhöhle, Show cave in Rheinfelden, Germany

The Tschamberhöhle is a limestone cave in Rheinfelden containing underground streams and waterfalls that flow through its passages. A portion of the cave system opens to visitors on marked pathways that reveal natural rock formations and water features.

The cave entrance was mentioned in 1839 and called a dripstone cave in 1859. During construction of the Basel–Singen railway in 1854 it was enlarged, then buried in 1856; searches from 1876 to 1879, including drilling, failed before it was rediscovered. Since 1890 it has been open as a show cave, initially over 560 metres; electric lighting followed in 1966. The Schwarzwaldverein Karsau ran it until 2018, when WST Rheinfelden took over.

The name comes from the adjoining Schambachmatten or Im Schampbach field name, worn down in Alemannic dialect to "d' Schamper Höhli"; local historian Rudolf Steiner showed it does not derive from the surname Tschamber. The cave has been run since 2018 by WST Rheinfelden with the attached tourist information office, after the Schwarzwaldverein Karsau operated it until then.

The cave is only open during specific seasons and limited days each week, so planning ahead and checking dates is important before arriving. The pathways underground can be slippery and narrow in places, making sturdy footwear and a headlamp or flashlight essential for a safe visit.

At the endpoint of the accessible route stands an active waterfall that demonstrates how underground water continues to shape the cave today. This natural feature reveals that the cave is not a finished formation but rather a living system still changing with flowing water.