I once spent a few minutes on a retired World War 2 amphibious military personnel carrier, floating on the Potomac River, directly on the landing path of aeroplanes landing at Dulles International Airport.
Looking back I’m a little surprised that we are allowed at all; I’m sure it would have been a security risk for the airport.
Well it was a great opportunity to shoot he planes, with a camera of course.
The boat was a DC Duck, which provides a unique way to tour Washington DC. You drive around the streets for a bit, then you drive straight into the river for a short river cruise, than back onto the road to where you zstarted!