15. See The Whole Of London In Miniature

The model covers an area from Paddington to Kings Cross, Battersea and the Royal London Docks. It includes major new proposed buildings and transport links as well as the familiar sites, so you'll also get a sneak peek of how the city will look in years to come. New London Architecture is open from Monday -Friday, 9.30am-6pm and on Saturdays from 10am-5pm.
14. Visit Speedy's Cafe In Camden

Literary purists will be disappointed to discover that the cafe and Sherlock's flat next door are not situated on Baker Street, the official residence of the fictional detective, but nearby around Euston Square. If you're wondering who that blue plaque is for as well, it's not for Sherlock and John it's to commemorate 19th century Italian politician, Giuseppe Mazzini, who once lived there. No connection.
Admirably for Speedy's, they haven't tried to cash in on their new found fame all too much, although you can pick up a mug or a T-shirt if you're passing through. We recommend you opt for a full English breakfast instead, which has also picked up some pretty decent reviews online. Speedy's Cafe is open Monday-Saturday, but is closed on Sundays.