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 Eye, Albania
The Blue Eye () is a water spring and natural phenomenon occurring near Muzinë in Vlorë County, southern Albania. A popular tourist attraction, the clear blue water of the river bubbles forth from a depth of more than fifty-metres. Divers have descended to fifty metres, but it is still unclear what the actual depth of the karst hole is.