There is a hidden underground cave about an hour outside of Salt Lake City in Heber Valley. One of Utah’s most unique destinations, The Homestead Crater is a geothermal hot springs that lives inside a 55-foot dome of limestone rock. The temperatures here sit at a balmy 90-96 degrees year-round. The springs’ size — 65 feet deep and 400 feet wide at the base — and warm temps make The Crater a bastion of activities in addition to the traditional hot springs soak.