Cult of the Lamb

There are 5 locations on the world map you can go to once you unlock the criteria for them, the areas will be around your Cult that is in the middle of the map. The world map wont unlock until you find Ratau unlocking the Lonely Shack area, so you must play a Crusade first, the areas are:

Lonely Shack: You will find a character called Ratau in the Darkwood area, this is part of the main story so you wont miss him, this will also unlock the minigame "Knucklebones" in his Shack. The Lonely Shack will be located in the top left area of the map

Pilgrims Passage: You will find another character in the Darkwood area called Fisherman, finding him will unlock his area that is to the bottom of the map underneath your cult called Pilgrims Passage, this area will also unlock the "Fishing" minigame

Spore Grotto: You will find a character called Seeking Sozo in the Anura area in a random encounter, this will unlock the Spore Grotto in the top right area of the world map

Smugglers Sanctuary: You will find a character called Plimbo in the Anchordeep area in a random encounter, this will unlock the Smugglers Sanctuary in the left area of the map

Midas's Cave: You will find a Golden Advertising Sign in the Silk Cradle area as a random encounter, this will unlock Midas's Cave that is to the right area of the map and you will find the character Midas there as well