Banff Upper Hot Springs
The springs were originally found by three employees of the Canadian Pacific Railway who tried to claim the land (but never got to exploit it.) It was these springs that led to the creation of the first National Park in 1885.
On this site a hotel was opened however it burned down. After being redeveloped it burned down again and the government took back the lease and opened a public facility here.
There was another public pool in Banff at the Cave and Basin but a rare snail lives in the sulphurous water and they were closed to protect it.