World's largest mineral hot springs pool. Cost is a bit pricey, so if this is a must do, I would advise staying at the Glenwood Hot Springs Lodge. The stay includes admission into the pool.
America's only mountain top theme park!
32 natural hot springs pools. Similar to Ojo Caliente, but more pools. You need reservations to chill here, so book early. It's on the Colorado River.
Natural underground sauna. Also need reservations.