The famous mental hospital of St Bethlehem's or "Bedlam" occupied three different sites in London before closing its doors in 1930 – on the site of Liverpool Street Station, in Moorfields, and in the building that is now the Imperial War Musuem (pictured). Much of the hospital's income was derived from letting visitors view the patients. In the 1800s, a local pub even built a balcony so drinkers could stare into the hospital's garden.