Unusal SPA in a .. Volcano

Not far from Cartagena (only 45 minutes distance) there is an estinguished Volcano used to have lava and fire now only .. mud. A peculiar mud. Volcán de Lodo El Totumo, as it is named, is today a 50-foot-tall mud bath. A real natural SPA where tourists climb up to immerse through the top entrance to literally 'swim' in therapeutic minerals.. my be not great to look ut, anyway apparently very healty and surely unusual...

Lodo el Totumo in a photo from CNN