The Boston University Bridge (on Commonwealth Avenue, Boston, Massachusetts) is the only place in the world where a boat can sail under a train driving under a car driving under an airplane.

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"It takes a lot of brains to enjoy satire, humor and wit - but none to be offended by them." -- Johnny Hart ("BC", cartoonist, 2000)
"Analyzing humor is like dissecting a frog: Nobody really enjoys it and the frog generally dies as a result." -- E. B. White