A Texan is in London for business, and decides he'd like to see the sights before he leaves, so jumps into a taxi and has them show him around.
They drive past Big Ben, and the taxi driver notes it took 15 years to build. The Texan scoffs at this. "You Brits are so slow! We'd build something twice the size in half the time!"
Next they swing by the Tower Bridge. Again, the driver comments that this impressive landmark was completed in only 8 years, and again the Texan scoffs. "That bridge is tiny! In Texas, we would have built a much larger bridge in just a year or two."
A little further on, they drive past Buckingham Palace, but the taxi driver doesn't comment on it. The Texan is puzzled, and asks "What's that then? I suppose that must have taken you a hundred years to build!"
The taxi driver just shakes his head. "Sorry mate, not sure what that one is - wasn't here yesterday."