Potion Permit

The game never straight up says it has fast travel without reading your journal, but it very much does. around town and the map are these grey banner markers, as in the achievement icon. you can see any you don't have active yet on the map as well. interacting with them unfurls them into their red banners and from that point on you can open your map and Fast Travel to them at anytime as long as you aren't in a building. Fast Travel also doesn't consume any time to perform.