Coral World Underwater Observatory, Underwater observatory and marine park in Eilat, Israel.

Coral World Underwater Observatory is a public aquarium and park south of Eilat's Coral Beach nature reserve. Its first attraction, a metal observatory of about 100 tonnes coated in epoxy paint, was assembled on land and sunk in 1970; a second observatory followed in 1991, its metal parts made in Shefa-'Amr and assembled at Eilat port. A white tower with a railed deck and spire rises from a circular building ringed by dark windows, standing on a platform over the water.

The facility opened in 1974 using innovative engineering to build observation towers that were then submerged in seawater. This pioneering approach made it one of the region's first underwater viewing installations.

The park's name changed from Coral World to Coral World Underwater Observatory, and the glass-bottomed boat moored at the bridge is called Coral 2000, built in Australia in 1994 and brought to Eilat in 1999. Its 48 windows sit about 1.5 m below the surface, letting passengers look sideways at the reef rather than down.

The observatory is reached by a roughly 100-metre bridge from the shore, and the Coral 2000 boat departs from the Coral pier on that same bridge. The glass-bottom boat has 45 seats and 48 windows about 1.5 metres below the surface, and its cruise along the Coral Beach reserve and Japanese Gardens lasts about 20 minutes. The park lies south of the Coral Beach nature reserve.

The circular exhibit contains about 360,000 liters of water housing hundreds of fish species in a contained tank system. This artificial setting allows visitors to see rare species they might not encounter in open waters.