Jolly Roger Bay

Dire, Dire Docks is the Water course in the game Super Mario 64. In this level there are Bob-omb Buddies, Goombas, a huge Unagi waiting in a cave below. Theres also a sunken ship, and even a cave that leads to an area where you have to guess the treasure chests in the right order.

The Music
Some people argue that this is the best Mario music that Koji Kondo has to offer.