FindingMickey.com

Fantasyland:  To celebrate its opening, Walt Disney had water collected from each of the World's Seven Seas and symbolically added it to the It's A Small World waterway. 

Note: Seven Seas is an archaic term referring to the seven bodies of water known to the Old World; predating the discovery of the Americas. The seven seas referred to are the Red Sea, Mediterranean Sea, Persian Gulf, Black Sea, Adriatic Sea, Caspian Sea and Arabian Sea (Indian Ocean). In modern usage, Seven Seas is a loose reference to all the oceans of the world. However, some believe that it specifically refers to the four oceans (Arctic Ocean, Atlantic Ocean, Indian Ocean & Pacific Ocean) and the next three largest bodies of water (Mediterranean Sea, Caribbean Sea & Gulf of Mexico).