On our way out of Etosha we stopped at this natural fountain with lukewarm water. The water is brackish which can be seen from the salts accumulating on the soil around the water.
This water is trapped underground under pressure and is pushed out in a fountain. The fountain works non stop day and night, year in and out. No pump needed. We could take a nice lukewarm shower to get the dust of the day off.
On our way northwest we saw some more of these, though they had pipes connected to take the water away.
Natural fountain with lukewarm water. Location of the photos on map:
Get Google Maps directions from your position to this attraction Natural Fountain With Lukewarm Water is part of: B1 Attractions Etosha National Park Attractions