The Titanic Sank in the North Atlantic in 1912

This powerful current flows from the Gulf of Mexico toward Europe and helps keep the climate of Western Europe milder than its latitude suggests.

Bounded by ocean currents instead of land, the Sargasso Sea is named for the floating Sargassum seaweed that gathers there.

Running roughly 16,000 kilometers, the ridge marks where tectonic plates are pulling apart, widening the ocean by a few centimeters each year.

Only the Pacific is bigger. The Atlantic stretches from the Arctic in the north to the Southern Ocean in the south.