Pyrate's Hideout
This is one of only a couple sets that have nothing but multiple sets combined that has a place on the map.
It has 3 sets included: Smugglers Fort, Maroon Gally, and Coffer Trap. Every part is included from the three, down to the last stud.
I give it a 6/10 for being completely unnescesary, other than the fact that some people want Skull Haven in one box.