One of my favourite monuments in London is The Monument. It's a monument to the Great Fire of London, it's a tower that you go inside and walk up the 311 steps to the viewing platform at the top, then enjoy the fab views.
The Monument was built in 1671 to commemorate the Great Fire of London (1666) and celebrate the rebuilding of the city. The tower is 202 feet high, exactly the same distance between the tower/monument and the location in Pudding Lane where the fire began. Designed by Sir Christopher Wren and his friend Dr Robert Hooke, the design is a Doric Column containing a spiral staircase of stone steps.
A small fee to enter is well worth the cost when you see the views from the top and learn a little about the historic site. You get a certificate on the way out to prove you survived the 311 steps.
Views of St Pauls, the London Eye, Lloyds building and more.
Address: The Monument, Monument Street, off Fish Street Hill, City of London.
Nearest Tube: Monument