This is the place, the graveyard Harry ended up after the Triwizard Tournament, where Cedric got killed. It was said in the Order meeting we had after the incident, they told me that the cup was a portkey and that they started a ritual after Harry touched it, along with Cedric. It was a ritual, led by Peter Pettigrew, for the Dark Lord to get stronger and be able to touch Harry. In the first year Harry used his touch to defeat him, and that couldn’t happen again. The ritual was set in motion and also try to kill Harry, giving even more power to the Dark Lord.