London Pass

If you are going to be seeing London, the London Pass could be a great option. It gets you into many sightseeing places without queuing, the price is included in the pass or you get a discount. I suggest that you plan ahead before you go to London and plan to see things that are located next to each other or at least the same side of London otherwise it could be a waste because you will not see as much. I would refrain from getting the travelcard included and get the Oyster Card instead.

All the Best!

American to Britain