A pervasive New York City urban legend tells of infant alligators brought back from Florida vacations and subsequently flushed down toilets only to form scattered colonies of full-grown alligators thriving beneath the city streets. Some versions describe the alligators as albino, having lost their pigment from living in the dark sewers for generations.
Nickname for Portland because of all the rainfall it receives. Puddletown has made its way into popular PDX culture, as it's commonly affixed to names of businesses, sports teams, et al.
A nickname locals use for Springfield. Contrary to its size, SpringVegas has something for everyone.
A nickname for Manitowoc for its location on Lake Michigan. I'm not sure why they it's capital with an '-ol' at the end--because I'm pretty sure Manitowoc isn't a building--but that's how it's spelled on the city's marketing literature, including the sign when coming into town.