Senegal's Lake Retba, or as the French refer to it Lac Rose. Gives off its pink hue due to cyanobacteria, a harmless halophilic bacteria found in the water. Lake Retba has a high salt content, much like that of the Dead Sea, allowing people to float effortlessly in the pink water.
The deepest pool in the world, named the Y-40 Deep Joy, the pool is now the star attraction at the Hotel Millepini, located in the Montegrotto Terme resort area, near Venice. Reaches a depth of 42 meters (138 feet), a space that could easily accommodate a 13-story building