Sail the high seas on the Kalmar Nyckel
The Kalmar Nyckel is a faithful recreation of a famous 17th-century Dutch ship that brought over colonists from Sweden who settled in the Delaware area. The historic ship is currently docked at at Wilimington's famous 7th Street Peninsula and open for visits, tours, and day-cruises in the Atlantic. One of the nice things about the Kalmar Nyckel is that it's a true, authentic re-creation: there are massive, billowing sails, thick ropes, wooden decks...basically, everything you'd expect from a great Colonial-era cruiser.
From April through November, you can book rides on the Kalmar Nyckel at a number of ports of call along the northeast Atlantic seaboard. Check the website for the exact dates and locations. Generally, it leaves from Wilmington, Delaware, Provincetown, Massachusetts, and Lewes, Delaware as well as a few ports in Virginia and Maryland. The sails are relatively cheap and last for a couple of hours. One of the nice things is that they let you bring your own refreshments so you can cruise the open seas while enjoying a nice bottle of wine.