0,0 Coordinate:
The point at which the equator (0° latitude) and the prime meridian (0° longitude) intersect assumed as 0,0 Coordinate, which has no real significance but it is in the Gulf of Guinea in the Atlantic Ocean, about 380 miles (611 kilometers) south of Ghana, and 670 miles (1078 km) west of Gabon.

 0 Sea Level /0 Altitude:
This marker indicating 0 sea level of world reference point, which is situated between Jerusalem and the Dead Sea.