Two Yanks were touring London in a taxi.
“What is that?” asked one of the Yanks.
“Why, that is Buckingham Palace,” answered the taxi driver.
“Well, you should see the States. We have much bigger houses over there.”
“And that?” asked the Yank.
“That is the Post Office Tower.”
“Oh, our towers are much bigger.”
This went on for much of the day until they passed another building.
“Our buildings are much bigger than that one too,” said one of the Yanks.
“I thought they might be,” said the taxi driver. “That is the mental institute.”