Barbossa's Grotto is a treasure-laden cavern and the hideaway of Hector Barbossa, Jack the Monkey, and Leon Warhawk. Since returning from the dead, Barbossa seems to want to keep to himself, but that doesn't mean he's unwilling to help a newly arrived pirate.
Barbossa gives the pirate their first pistol, in the Set Sail Story Quest. He also instructs them in the use of the pistol by using his pet monkey Jack for target practice. Thankfully, Jack is undead already.
The Grotto features waterfalls and the sounds running water. There is a small raised area at the center where Hector stands with his treasure horde.