The small town of Brookfield is probably best known for the Floating Bridge across Sunset Lake. Built in 1820 and replaced six times since, it's the only floating bridge east of the Mississippi.
The one-lane bridge was last reconstructed in 1978 and relies on 380 floats to remain on top of the water (the lake is too deep to support a pillared span). Unfortunately, the bridge has been closed to vehicles since 2008 because of needed repairs.
Even though cars are prohibited indefinitely, you can still easily cross the bridge on foot and get a wide view of the lake's natural beauty (although your feet might get a little wet in the process because the mid-section is partially submerged).
The 320-foot-long bridge is also a popular spot for fishing and is the main attraction during the town's annual ice harvest festival in late January.