This monument was built to remember the Great Fire of London of 1666. Again, like all things in London, it's gilded with gold.
It wasn't until after I got this photo home and up on my screen that I noticed there were some hardy souls actually standing up at the top deck. A bit of research reveals that they just completed a claustrophobic climb of four hundred steps. You actually get a certificate for making the climb successfully (I'm not making this up).