The Secret Laboratory Under the Monument
By Sandra Lawrence, Jan 27 2016 11:43PM
Incredibly, there is a secret laboratory under the Monument, accessible only through a tiny hatch under the stairs, where Robert Hooke and Christopher Wren set up a zenith telescope. I managed to get access to it for Londonist. I also donned a harness and clambered up inside the urn at the top, for a birds' eye view of the capital in the early morning sun.