Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

Sir Ernest Shackleton's gravesite at Grytviken, Swedish for Pot Cove, on South Georgia in the South Atlantic, Polar Regions

Captain at the helm and helmsman in training on the bridge of a ship, on the Hanse Explorer in the evening, Great Britain

Captain and helmsman in training on the bridge of a ship, Hanse Explorer, in the evening light, Great Britain

The yacht, ship, Hanse Explorer and the cliffs of the island Noss, Shetland Islands, Scotland, Great Britain

Werck. Lockheed L-1011 TriStar three-engine plane intentionally sunk in 2019. In addition to being a great attraction for divers, these sunken structures;generally ships, but also planes, military vehicles...) become artificial reefs helping in the repopulation of the underwater bottoms. This wreck is located in the Red Sea, at a depth of between 18 and 31 meters. Aqaba, Jordan.