Lake Retba, or as the French refer to it Lac Rose, is situated north of the Cap Vert Peninsula in Senegal, northeast of Dakar. The lake's harmless bacteria makes it pink while it's high salt content makes in easy to float on
Cameron Falls Alberta, Canada Incredibly rare moment: a waterfall turned tomato soup red. The red coloring of the water is a result of heavy rainfall washing sediment (with large quantities of argolite) into the river.
Gunther and Christine Holtorf started a month road trip in 1989 that turned into a 23 year road trip around the world in their 1988 Mercedes Benz G-Wagen named Otto. That looks like it would be amazing! Although I'm not sure I could do it for 23 years.
A unique geological phenomenon known as Danxia landform. Observed in several places in China. This example is located in Zhangye, Province of Gansu. The color is the result of an accumulation for millions of years of red sandstone and other rocks.