I'm finally back, and I can say that my "taller than" question has been completed.
And the final answer was....
Big Thunder Mountain Railroad!!

JWill nailed it!
Final correct answer list:
Spaceship Earth & wand (ryley26)
Tree of life (ryley26)
Cinderella's castle (ryley26)
Space Mountain (ryley26)
Tower of Terror (jwill)
Earful Tower (jwill)
BTMRR (jwill)
Really
tall AAQ cards to ryley and jwill.
Karen...great to see you again but you posted a correct answer that someone else had given. Still, it's always nice to see you around!
MCMom...great to see you too! According to my dubious sources, Splash Mountain is only about 87 feet tall.
Higgs & POOH....the question asked for the park attractions, I guess I should have said the four major theme parks. In any event, Summit Plummit was two feet short at 120'. And Mount Gushmore appears to be about 90 feet tall.
ryley...Swiss Family Treehouse is a shrimp at only 60'!
Steve....I think you're being a little hard on yourself there. The monorail does top out about 40'!
