The London Pass

Great option if plan to visit good number of sites

Great value though plan your time to make sure you will visit and take advantage of the savings. liked the little guide book they provided and they were very helpful when had an issue with returning one pass when a traveler didn't make the trip.
The place to pick it up needs a bit better signage to find it in the lower level of the kiosk. Lines can be long so be patient if go there at a busy time.