1. Calistoga Hot Springs—Calistoga, California
Calistoga is minutes from one of the United States’ most famous wine valleys, Napa. There are four pools on the property at Calistoga. The grounds are beautiful, more manicured than many on this list, and visitors can expect to pay for all that manicuring, but the views are amazing. The hills stretch skywards all around, making visitors feel like they’ve truly found an oasis.