We took the longest ferry run between Burlington and Port Kent NY, which takes about an hour. The ferry leaves from a terminal a few blocks from downtown Burlington, located in the extensive and very pretty lakeside park.
We took the trip strictly for the purpose of sight seeing. We did not take the car which we left in the free parking lot across from the terminal. Since it was a beautiful summer day, we were not the only people there just to go cruising. At just $5 each way per person, It was well worth the price.
There isn't much to see in Port Kent, other than nice views looking back to Vermont, but the return ferries run almost every hour during the summer. These are good sized car carrying ferries with a snack bar and indoor seating. But we spent the entire time up on deck completely entertained by the beautiful views in every direction.