The birthplace of Canada's national park system. In 1883, three railway workers discovered the hot springs in this cave near the Bow River and attempted to stake a private claim. The federal government intervened and established the Banff Hot Springs Reserve in 1885 — which became Banff National Park in 1887. The cave and the outdoor basin where the springs emerge are now a national historic site with a museum explaining the park's origins.
The original bathing pools are no longer open for swimming (they were closed in 1990 to protect the hot spring snail, a unique species found only here), but the cave and the outdoor basin can be explored on self-guided trails. The museum has good exhibits on the history of the national parks and the wildlife of the Rockies. Located about 2 km southwest of town on Cave Avenue. Admission is $4.25.