“They marched in silence around a corner and she stopped before a large and extremely ugly stone gargoyle.
‘Sherbet lemon!’ she said. This was evidently a password, because the gargoyle sprang suddenly to life, and hopped aside as the wall behind him split in two.”
Harry Potter and the Chamber of Secrets, by J. K. Rowling

Gargoyles, according to Wikipedia, are grotesque figures carved with a spout designed to convey water from a roof and away from the side of a building. For some reason, they often jut out of universities’ edifices.

University of Chicago:

Yale University (Sterling Memorial Library):

Duke university:

Princeton University:

Dartmouth College:

University of Pennsylvania (Penn Quad Gargoyles):

Washington University at St.Louis (this is actually a boss):

Bradley University:

(see more from Bradley)