Hot Springs

This bathhouse includes an option to soak in radioactive water.

The only natural cave bath in all of Europe.

Naturally carbonated water fills the mineral baths at this 19th-century California resort.

Along the Outback Scenic Byway, adjacent to hot springs, this human-made geothermal feature takes unexplained breaks.

An unsigned roadside spring that is pure fun.

Located in a remote mountain valley in Yamagata Prefecture, these hot springs have attracted bathers for over 450 years.

A geothermal pool in North Iceland that is said to be the bathing spot of the legendary Grettir the Strong.

It's believed the famed author's parents once used this spring to gather water.

Previously a hot spring, this park remains a site of unique history, wildlife, and geology.

Take a dip in the world's largest mineral hot springs pool.

An idyllic mineral hot springs facility with a more-than checkered past.

On the outskirts of an opal-mining town, these baths fed by a massive underground aquifer are a natural spa.

Thermal springs underneath the seabed provide the heat and bubbles for these beachside natural hot tubs.

Come for the springs; stay for the mud bath.