5. Visit New York City Marathon
If you and your significant other are athletic people, signing up for the New York City Marathon could be the best and most romantic thing you can do during the fall. The marathon will be on the first Sunday in November in NYC. This Marathon is the largest marathon in the world with 51,394 finishers in 2016 and 98,247 applicants for this year. The first New York City Marathon was back in 1970, 47 years ago and continues to be a big deal in the city.