Hot bubbling mud pool at Orakei Korako Thermal Park, The Hidden Valley, North Island, New Zealand, Pacific

Adult mudskippers (Periophthalmus spp), gathering as the tide rises, Bako National Park, Sarawak, Island of Borneo, Malaysia, Southeast Asia, Asia

One of the Emerald Lakes, explosion craters filled with mineral-tinted water, on Mount Tongariro in the Tongariro National Park on the central plateau, North Island, New Zealand

View from Mud Island Park, Memphis, Tennessee, United States of America, North America

Mud Island Park, Memphis, Tennessee, United States of America, North America