I'll add my own favorite trivia question; let's see who gets it fastest. Try not to Google if you can help it. :)
Who's the only president buried IN Washington, DC?
Darn! I used to know this. It's NOT Kennedy - Arlington is in Virginia, although a short walk away.
I promise not to Google . . .
Grant, in Grant's tomb?
I thought it was notable which presidents were survived by one or more parents. Kennedy was the only one survuved by both. I think Polk's mother and Garfield's father (or vice-versa) survived them.
Wilson - his tomb is in the National Cathedral. (I go there a lot)