You may have looked twice after spotting some odd-looking boats passing by.

Three amphicars were seen travelling with passengers in tow along the River Medway in Maidstone this weekend.

A stunned onlooker said all of them were heading in the direction of Tovil on Sunday at around midday.

The vehicles are half car and half boat, allowing them to go from land to water seamlessly – powered by twin propellers mounted on the rear bumper.

They were manufactured in Germany from 1961 to 1967.

Less than 4,000 were produced, with around 500 believed to still be in regular use.

The vehicle is the only non-military amphibious vehicle ever to be mass-produced.

Costing £70,000 to £100,000, they are capable of running at speeds of 70mph on road and around eight knots on water.

It’s not the first time the eye-catching vehicles have been spotted bobbing up and down the River Medway, with a vintage fanatic from Ashford having imported his from Canada after purchasing one on eBay.

The vehicle also inspired a BBC Top Gear episode, with presenters Jeremy Clarkson, Richard Hammond and James May.

They were challenged with the task of converting a conventional land-bound car into an amphibious vehicle, and then having to cross a lake in it.