The National Maritime Museum in London

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Contains the UK's national collection of Martime artifacts (although do not expect much in the way of whole ships). One of the buildings housing the museum is the Queens House, built by Inigo Jones and the first Palladian building in England.
Price: Free
Hours: 10AM-5PM, closed 24-26 Dec
Address: Romney Rd SE10
Phone: +44 20 8858 4422
Url: http://www.nmm.ac.uk/

Source wikitravel.org/en/London/Greenwich