Senegal's Lake Retba, or as the French refer to it Lac Rose: harmless halophilic bacteria make the water pink. Lake Retba has a high salt content, much like that of the Dead Sea, allowing people to float effortlessly in the massive pink water.
The Laburnum arch with purple allium at Bayview Farm and Garden, owner Maureen Murphy, at Whidbey Island, Langley, Washington. The yellow flowers are Golden Chain or Chain of Gold trees made to look like Wisteria .
Sea Cave, Malta Sea caves or the Blue Grotto are located on the island of Filfla in Malta. These caves are popular for their beauty and their location when combined with the sunrise, leads to beautiful shades of blue in the water.
The Netherlands is famous for its tulips and windmills. There are still over a thousand windmills in the Netherlands, often run by volunteers. Tulips are cultivated in fields full of beautiful colors throughout the country in the spring.
Argentinian artist Leandro Erlich created this illusion of people walking underwater called The Swimming Pool, for The Century Museum of Contemporary Art in Kanazawa, Japan. It's a piece of glass with water on top of it, and empty space on the bottom.