This is a full circle around Little Cayman, Cayman Islands, on the only road around the island.  A beautiful but VERY humid and hot route in a remote part of the Caribbean Ocean; requires a puddle jumper to get there.

- Submitted by Dave Stock

High Trestle Trail is a 25 mile heavily trafficked point-to-point trail located near Ankeny, Iowa that features a river and is good for all skill levels. The trail is primarily used for hiking, walking, running, and road biking and is accessible year-round.  On April 2, 2015, the BBC designated the High Trestle Trail Bridge as one of the eight amazing footbridges in the World.

https://en.wikipedia.org/wiki/High_Trestle_Trail) 

- Submitted by Dave Stock