Becuase that's the place where his crew was staying...
So he went there to take them
I think he wants to know why he had his crew stay there.
Well, Law thought he'd die so he had them go to Bepo's home so they'd stay safe.
OT: Just to re-unite with their crews. At least, they probably plan to split up, but whatever happened to Sanji will prompt them to stay together for safety I bet.