Enjoy two of londons great attractions with this flexible tour of the river thames and entrance to the world famous london bridge experience hop on and hop off your river sightseeing cruise from four conveniently located piers for 24hr and let the london bridge experience take you through 2000 years of history and haunted tunnels where you will see hear and smell what london bridge was like throughout the ages enter the vortex and get ready to face your fears as you land at the london tombs