After dinner, despite a downpour, we went to the naturally heated outdoor pool.

The property also contained an enclosed spa of naturally heated water.

Thanks to the country's geothermal energy, virtually every town in Iceland has a naturally heated pool.

The mud is a combination of local volcanic ash, imported Canadian peat and naturally heated mineral waters.

In 1914 a naturally heated swimming pool was opened to the public and continued to operate until 1994.

Along the lake shore are several outdoor hot springs and a sand beach with naturally heated sand and hot ground water.

They are not exclusive: A sentō can be called an onsen if it derives its bath water from naturally heated hot springs.

It is adjacent to the Springs, (800) 225-0934, a series of naturally heated mineral hot springs.

The folk of Seething Springs took advantage of naturally heated dens.

A guesthouse is located in the area with naturally heated outdoor hot tubs.