America: you might think you're the big boy on the block, but come back to us when you've got as much history and as many fancy old buildings as the UK.
Yeah, that's right - jog on, as it's literally impossible to overtake us. We are the daddy.
To celebrate our glorious collection of bridges, castles, palaces and, er, roundabouts, see if you can name 50 of our best landmarks. Get started below.