3) The Five Bridges Run

Where: All of NYC. The bridges you'll cross include 59th St. Bridge, the Pulaski Bridge, the Williamsburg Bridge, the Manhattan Bridge, and the Brooklyn Bridge
Length: 16.68 miles (regular) or 3.37 miles (short)
Cut it short: Run two bridges instead: Start at Borough Hall and head directly over the Brooklyn Bridge. Cut across to the Manhattan Bridge and back down to the starting point.
When to go: To avoid traffic, definitely go early weekend mornings. Sunday is best.
Good to know: The course is a bit complicated. If you're new to the city, bring a friend
What you'll see: Everything