Cathedral of the Lost
Cathedral of the Lost is located near a shore, south of San Francisco. It has a graveyard and a few quests.
It will cost 10 caps to gain entrance to the Cathedral proper. You can pay 5000 caps here to reset all of your reputations to 0, which will also remove the Childkiller and Grave Digger statuses.
Note: This location has nothing to do with Cathedral which was used by Children of the Cathedral in Boneyard. The other Cathedral was destroyed and now it's a Crater.
Location
Cathedral is located at Grid 12:32 (a little south of the most evil place on earth along the coast).