The Monument

In September 1666 a fire swept through London for 3 days destroying thousands of buildings. A monument to the fire, known by Londoners as "The Monument" was erected one block from where the 3D print show will be held this year exactly 348 years since the fire was extinguished.
I won't be able to get to the show this year, but if you do, you can climb the 311 steps inside the tower on a cantilevered staircase to the viewing platform. Or, you could just print one and look at it ;)
From Wik