Small cove Lagoa Azul on the north coast of Sao Tome Island, Republic of Sao Tome and Principe, Africa

Aerial of the Formentor Peninsula, Mallorca, Balearic islands, Spain, Mediterranean, Europe

Yachts anchored in rocky cove with crystal clear turquoise water at Russian Bay, Poros, Saronic islands, Greek Islands, Greece, Europe

Crystal Cove State Park, Orange County, California, United States of America, North America

Aerial view of la manga del mar menor with its crystal clear turquoise waters gently lapping against the rocky coastline near cala reona

Packed touring bike, crystal clear water in a shallow bay, view of the mountain range Seven Sisters, cycle tourism, cycle trip, Heroey Island FV 17, Kystriksveien, Nordland, Norway, Europe

Tourists enjoying summer holidays on lakdayan beach, coron island, taking a selfie with turquoise sea and palm trees in the background

Crystal water bay in Mallorca, Spain, Europe