United Kingdom
A visit to London must surely include a boat trip on the Thames. Reasonably priced and interesting for everyone. I would recommend doing this early on during your trip because from the river, you can get your bearings and identify historical sites like the Tower of London that you may wish to add to your list of places to visit on land.
London duck tours is a tour bus company, but with a difference. They use world war two amphibious vehicles that were used in the d-day landings. First, you go on a land-based tour of London, with hilarious comedy, sorry did I say comedy?, I meant commentary. Then you go down a slipway right next to MI6 HQ and into the Thames where you chug up and down the river for a bit. Unfortunatly you cannot go too near the houses of Parliament due to terrorists, but of course there are always going to be terrorists on a bright yellow WW2 vehicle aren't there?
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