If I suggested we jump in a vehicle and drive into the River Thames, you'd say I was crazy. If, however, I said we'd be inside a perfectly safe amphibious craft operated by London Duck Tours, then you might think I wasn't quackers after all.
The popular London Duck Tour company has been plying the waters of the Thames (as well as the surrounding roads) for a few years now, adding an exciting twist to the traditional city sightseeing tour.
On a London Duck Tour, you travel about in an amphibious craft (the Duck) that was first used for the D-Day landings.
More than 22,000 of these machines were built to take the troops ashore all those years ago, with a few having since been lovingly restored and converted to do something altogether more peaceful than drive into battle.
Tours start and finish in Chicheley Street, very close to the London Eye on the south bank of the River Thames.
You'll begin by being driven around central London, past famous sights such as the Houses of Parliament and Trafalgar Square, before quite literally driving into the River Thames, whereupon the watery part of your tour begins.
Fun and informative commentary is provided by knowledgeable guides who'll tell you everything you need to know about the Smoke, as well as about the Duck you're driving (or sailing) in.
The vehicles meet stringent safety standards, so there's no chance of you driving in and disappearing under the water. In fact, seeing how utterly chaotic London roads are these days, you're probably a whole lot safer in the water than on land.
Although you'll be in the Thames for part of the tour, you needn't worry about getting wet. A bit of spray off the river on a windy day is a possibility, but that's about it.
If the winds are really strong, or if there's a massive snowfall, tours may be postponed until the conditions improve.
Duck tours leave Chicheley Street every 15 minutes and last approximately 75 minutes. As you'd expect, kids love the thrill of driving off the road and into the water and sailing along Britain's most famous river, and dare I say, a fair few adults love it too.
London Duck Tours has a comprehensive FAQ page here.