Mud bubbles in a mud field in the Te Puia Maori Cultural Center, Rotorura, North Island, New Zealand, Pacific

Bubbling mud pool at Te Puia Springs, Rotorua, North Island, New Zealand, Pacific

Bubbling mud, Waiotapu Thermal Area, Rotorua, North Island, New Zealand, Pacific

Bubbling mud, Waiotapu Thermal Area, Rotorua, North Island, New Zealand, Pacific

Bubbling mud, Waiotapu Thermal Area, Rotorua, North Island, New Zealand, Pacific

A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland

A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland

A view of the boiling mud at N�ï�¿�½�Ã�ºmafjall, Iceland

A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland

A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland

A view of the boiling mud at N�ï�¿�½�Â� mafjall, Iceland

Seltun, Seltun, hot springs and mud pots, geothermal area, Krysuvik high temperature area, Krisuvik, Reykjanes peninsula, near Reykjavik, Iceland, Europe

Boiling mud, splashing mud pot, high-temperature area Namaskaro or Namskard, Namafjall, Myvatn or Myvatn, North Iceland, Iceland, Europe

Mud bubble, mud pot, high temperature area Namaskaro or Namskard, Namafjall, Myvatn or Myvatn, North Iceland, Iceland, Europe