Green Canyon Hot Springs Resort, Newdale, Idaho

A step-back-in-time guide covering the pools, swim camp, the campground and a 1918 photo of the old Pincock pool.

Travel writer Matt Thomas pitches Green Canyon as a chance to step back in time at a hundred-year-old, privately owned spring. He covers all four pools, notes that hours change with the season, and points families to the week-long swim camp for kids five and up, two hours a day.

The campground gets its own section: sites from dry camping to full hookups, picked from a map when you book, with shade and picnic tables. The best part is the photo at the end, a well-dressed crowd standing over Pincock Hot Springs around 1918.