Tidal pool on a deserted beach at Bedruthan Steps, Cornwall, England, United Kingdom, Europe

Tidal pools on Bedruthan Steps beach at sunset, Cornwall, England, United Kingdom, Europe

A reflection of Cathedral Rock in a shallow pool of water on the northwest slope, Sedona, Arizona, United States of America, North America

Natural pools of Porto Moniz, Madeira, Portugal, Atlantic, Europe

Sea Lettuce (Ulva lactuca), distinctively shaped green algae found in shallow rock pools, St Abbs, Scotland, UK North Sea

Porco's bay and Dois Irmaos islands, Fernando de Noronha national marine sanctuary, Pernambuco, Brazil (S. Atlantic)

A Filipino Tour Guide Holds A Lantern Inside Sumaging Cave Or Big Cave Near Sagada, Luzon, Philippines

A Filipino Tour Guide Holds A Lantern Inside Sumaging Cave Or Big Cave Near Sagada, Luzon, Philippines

A Filipino Tour Guide Holds A Lantern Inside Sumaging Cave Or Big Cave Near Sagada, Luzon Philippines