Wild Galapagos giant tortoise (Geochelone elephantopus) in mud pit on Santa Cruz Island, Galapagos, Ecuador, South America

Steaming volcanic mud pools, Rincon de la Vieja National Park at foot of Rincon Volcano, Gaunacaste, Costa Rica

Caucasian man steering bicycle around mud puddle

Sedimentation pool, sludge pond in the mining area of ??the open pit mine, Erzberg mountain at Eisenerz, Styria, Austria, Europe

Sedimentation pool, sludge pond, open pit ore mining, Erzberg mountain at Eisenerz, Styria, Austria, Europe

Geothermal area Hveraroend near lake Myvatn and the ring road during winter with mud pools , fumaroles and solfataras. europe, northern europe, scandinavia, iceland, February

Geothermal area Hveraroend near lake Myvatn and the ring road during winter with mud pools , fumaroles and solfataras. europe, northern europe, scandinavia, iceland, February

Geothermal area Hveraroend near lake Myvatn and the ring road during winter with mud pools , fumaroles and solfataras. europe, northern europe, scandinavia, iceland, February