Sarthong V

From Memory Alpha, the free Star Trek reference

Sarthong V is the fifth planet in the Sarthong system. It is home to impressive archaeological ruins which are off-limits to outsiders.

Vash considered a visit to Sarthong V in 2366 after parting company with Jean-Luc Picard on Risa. (TNG: "Captain's Holiday") Despite his warnings about the manner in which Sarthongians treated trespassers, Vash did make the trip to the planet and was able to return with several impressive artifacts. (TNG: "Qpid")