The Cave and Basin National Historic Site is where Canada's national park story began. In 1883, three young Canadian Pacific Railway workers stumbled upon natural hot springs inside a cave on the slopes of Sulphur Mountain, setting off a chain of events that would lead to the creation of Banff National Park — and the entire Canadian national parks system. Today, the Cave and Basin is a fascinating museum and historic site that every visitor to Banff should experience.
The Discovery Story
In November 1883, Frank McCabe, William McCardell, and their brother Thomas discovered a hole in the ground from which steam was rising. They lowered themselves into the cave and found a pool of naturally heated mineral water. Word spread quickly, and competing claims over the hot springs led the Canadian government to step in.
In 1885, Prime Minister John A. Macdonald set aside a 26 km² reserve around the springs — Canada's first protected area and the seed of what would become Banff National Park and, eventually, Parks Canada's network of 48 national parks and hundreds of historic sites.
What to See and Do
The Cave
The centrepiece of the site. Walk inside the actual cave where the hot springs were discovered. The cave is dark, warm, and humid, with naturally heated mineral water (approximately 30°C) pooling at the bottom. The sulphur smell and mineral deposits on the rock walls are unmistakable. Interpretive panels explain the geology and the discovery story. It's a surprisingly atmospheric and evocative experience.
The Basin
Adjacent to the cave, the basin is a larger outdoor pool area that was historically used for public bathing (swimming is no longer permitted). The warm mineral water flows through the basin into the surrounding marsh, supporting a unique ecosystem of rare snails and plants.
Interactive Exhibits
The museum building houses engaging exhibits covering the history of the hot springs discovery, the creation of the national park, Indigenous history in the Bow Valley, and the evolution of conservation in Canada. Interactive displays are well-designed and engaging for all ages.
Discovery Walk
A short outdoor boardwalk trail (approximately 400 metres) winds through the marsh ecosystem below the cave and basin. Interpretive signs explain the unique warm-water environment created by the hot springs outflow. In winter, the warm water keeps the marsh ice-free, creating a surreal green oasis surrounded by snow.
Keep an eye out for the endangered Banff Springs snail (Physella johnsoni), which exists only in the thermal springs of Banff and is one of Canada's rarest species.
Practical Information
- Location: 311 Cave Avenue, at the end of Cave Avenue off Banff Avenue (1.5 km from downtown)
- Hours: Generally 10am-5pm daily (seasonal variations). Closed Tuesdays and Wednesdays in winter
- Admission: Adults $8.50, seniors $7.25, youth (17 and under) free. Parks Canada Discovery Pass holders enter free
- Time needed: 1-2 hours for the full experience (cave, basin, exhibits, and Discovery Walk)
- Accessibility: The main building and exhibits are wheelchair accessible. The cave has a ramp. The Discovery Walk has some uneven sections
When to Visit
The Cave and Basin is enjoyable year-round:
- Summer: The Discovery Walk is at its most lush. Combine with a walk or bike ride along the nearby Bow River trail
- Winter: The warm-water marsh stays green and steam rises from the cave entrance — a dramatic contrast against the snow. The site is quieter and more atmospheric in winter
- Rainy days: One of the best indoor activities in Banff. The cave and exhibits are fully covered
Combine with Nearby Attractions
The Cave and Basin is close to several other attractions:
- Banff Upper Hot Springs: 5-minute drive up Mountain Avenue — soak in the mineral water you just learned about
- Banff Gondola: Also on Mountain Avenue, a 5-minute drive
- Sundance Canyon Trail: The trailhead is near the Cave and Basin — a 7.6 km round trip walk to a small canyon with waterfalls
- Bow Falls: A 15-minute walk along the river from the Cave and Basin