The best replacement for hot spring is sundance.

The best alternatives to hot spring are rated as following:
★★★★★  sundance
★★★  caldera
★★★  geyser
★★  cal spa

Your alternative for hot spring is not listed? Suggest!
Speaking about hot spring, one probably shouldn't forget about private pool.

Other search terms related to hot spring and their ratings are:
★★★★★ private pool
You have in mind a companion for hot spring and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of hot spring in all years. Click on graph for more.
hot spring
sundance
caldera