The giant yellow mushroom located outside Fantasyland's Alice in Wonderland is a former A-E ticket booth.
Ride tickets were identified by letters, A through E. A tickets were the least expensive, allowing guests to ride attractions like the King Arthur Carrousel or the various cars & carriages on Main Street. Introduced in 1959, E tickets were the priciest - granting admission to rides like the Matterhorn, Monorail and the Mine Train.