Rook sacrifices on h5 (xN) in the Sicilian Dragon
Here are many hundreds of exchange sacrifices (exchanging the rook for a Black knight on h5). The idea is classic... to give up some material in order to pry open the Black kingside. As Fischer once said, the Dragon is just "Sac, Sac, Mate!"
There are many inter-related themes. White will often follow up with Rh1xh5, or with g5-g6, or with Nd4-f5. Play through these games and become an expert in slaying the Dragon!