The entrance to St. Mungo's is concealed behind an abandoned red-brick London department store called Purge and Dowse, Ltd. on a Muggle street. Unlike, say, the Leaky Cauldron, St. Mungo's is visible to passing Muggles, who merely believe the sign on the front that the store is "Closed for Refurbishment." In the front window, a dummy dressed in outdated styles serves as the gatekeeper; wizards wanting to enter do so by talking to the dummy, and then walking straight through the window.
Inside, in a reception area filled with rickety wooden chairs and outdated issues of Witch Weekly, visitors are greeted by the Welcome Witch, though her demeanor (at least on busy days) is less than welcoming. This reception area seems to double as a visitors' entrance and an emergency room waiting area, as it is often filled with wizards facing strange ailments, such as hands sprouting out of their chests or steam pouring from their mouths, and Healers clad in uniform lime green robes hurry busily through the room