Willimantic is best known for its frog legend.
The "Battle of Frog Pond" was an incident in 1754 around the time of the French and Indian War. The citizens of Windham (Willimantic is located in Windham) were awakened in the middle of the night by a tremendously frightening racket just outside of town. Assuming the worst, they seized their arms and prepared for the impending Indian attack. When morning arrived, the armed villagers marched in the direction of the noise only to discover that the nearby pond had dried up, and the area was littered with hundreds of dead bullfrogs. The frogs that still lived were heading to the Willimantic River in search of water. Thus, the fearsome sounds that had plagued the citizenry the previous night had not been Indians but rather bullfrogs "fighting" for water. The pond was renamed Frog Pond, the story spread throughout the towns and colonies, and the legend was born. The story is apocryphal, and most likely well embellished by local color. Nevertheless, the town has recently erected a Frog Bridge to commemorate the incident, featuring frogs atop spools of thread.
Google is a wonderful thing.