Blue Hole (Red Sea)
The Blue Hole is a diving location on the southeast Sinai, a few kilometres north of Dahab, Egypt on the coast of the Red Sea.
Blue Tent, California
Blue Tent lies on a gold-bearing channel of an ancient river bed. The channel runs from the San Juan Ridge through Scotts Flat, California, Hunt's Hill, California, and You Bet, California to Dutch Flat, California and Placer County.