Cost: From $215 per night
Have you and three of your closest friends always wanted to hit Amsterdam, but reached an age where you're really stretching the "youth" portion of youth hostels?
Well, the docks next to Amsterdam's canals are home to a floating neighborhood of houseboats that includes The Ambulatory. This restored houseboat and its terrace offer a great view of the passing ships, but is also just 10 minutes away from the nearest train station.
You're not going to need a car to get around at all. You can walk right to the houseboat, rent a bike a few blocks away or have the owner take you on a canal cruise on his antique boat. From the canals, you'll see stunning gabled houses and mansions with blooming gardens that you can tour during Open Garden Days in June. If that's less your speed, the Grachtenfestival in August features classical music performances along the canal and on a floating podium.