We used our London Pass to access the Tower of Lon...

We used our London Pass to access the Tower of London, so for us it was a good value-for-money stop. We just missed the start of the tour, so ended up walking around ourselves, but I'd probably recommend jumping on a tour if you can. Be prepared that the crown jewels area is very crowded and you may have to line up for a while if you go during a busy time.