It is a canyon that is under the sea.
A canyon is a place where the ground has eroded into a deep ravine or gully - like the Grand Canyon. The sea is the same as the ocean.
Undersea canyons can vary in depth, with some reaching depths of over 3,000 feet or more. The depth of an undersea canyon depends on various factors such as the geology of the area, tectonic activity, and ocean currents.
Undersea volcanoes that erupt.
Undersea Fleet was created in 1956.
Undersea Quest was created in 1954.
Undersea Trilogy was created in 1992.
Undersea City was created in 1958.
The duration of Undersea Kingdom is 3.77 hours.
Undersea Trilogy has 501 pages.
Jules' Undersea Lodge was created in 1986.
Some islands may be built by undersea volcanoes.
Naval Undersea Museum was created in 1995.
Undersea Kingdom was created on 1936-05-30.