The single most surprising small museum in London. The Regency architect Sir John Soane left his house, his collection, and a stipulation in an 1833 Act of Parliament that none of it could be moved or rearranged — and it has been left more or less as he died in 1837. The result is three connected townhouses jammed top to bottom with antique fragments, plaster casts, paintings hung four deep on hinged panels, and the alabaster sarcophagus of Pharaoh Seti I in the basement.
Highlights include Hogarth's Rake's Progress and Election series — eight paintings unfolded sequentially from the hinged Picture Room walls, which is one of the great theatrical moments in any London museum — and the Monk's Parlour, a gloriously theatrical gothic room with its own fake medieval origin story. The light wells, mirrors, and small interior courts are an essay in domestic Regency architecture by a master of the form.
Free entry, but slot booking is highly recommended — the rooms are small and entry is timed. Allow ninety minutes minimum.