Bands of light sand grains sorted from heavier dark minerals in intertidal zone at Playa Carrillo, Nicoya Peninsula, Costa Rica, Central America

Patterns in the kelp at low tide on South Georgia Island, Southern Ocean

An ephemeral pool of water in the granite riverbed of the Agua Fria River Canyon in the Agua Fria National Monument of Arizona.

Fuerte de Loreto at sunset, Historic Zone of the Forts, City of Puebla, Puebla State, Mexico

Simos beach with turquoise water, Elafonisos island, Greece

The intertidal zone of the Quantock Coast, West Somerset, contains an abundance of geology and wildlife. It is a Site of Special Scientific Interest (SSSI) and is of international geological importance.

The intertidal zone of the Quantock Coast, West Somerset, contains an abundance of geology and wildlife. It is a Site of Special Scientific Interest (SSSI) and is of international geological importance.

Pond of Vihula Manor Country Club, Lahemaa National Park, Estonia, Europe

Fishermen's huts perched upon cliffs around Tamri on Atlantic Coast, between Agadir and Essaouira, Morocco

Lake Sandoval in the protected reserved zone Tambopata Peruvian Rainforest, South America

Lake Sandoval in the protected reserved zone Tambopata, Peruvian Rainforest, South America

Lake Sandoval in the protected reserved zone Tambopata Peruvian Rainforest, South America

Lake Sandoval in the protected reserve zone Tambopata, Peruvian Rainforest, South America

Lake Sandoval in the protected reserve zone Tambo Pata, Peruvian Rain Forest, South America

Lake Sandoval in the protected reserved zone Tambopata, Peruvian Rainforest, South America

Lake Sandoval in the protected reserved zone Tambopata, Peruvian Rainforest, South America