Cruise the Canals (Bruges): Those open-top canal boats can be scorching in hot weather and bracing in cold, but they're fun and they afford you a uniquely satisfying view of the city. There's even a stern-wheel paddle steamer that sails along the canal to the nearby village of Damme.
Bicycle Through Town (Bruges): Unlike most Belgian cities, Bruges has made bicyclists privileged road users, with rights of way that motorists would kill for. You can ride through the city, around it on the ring canal park, and outside it on fresh-air excursions.
Skate the Canals (Bruges): Whenever the canals freeze solid in winter -- and sadly, this happens only rarely -- you can strap on a pair of ice skates and tour the center of town. Be sure to wait until plenty of the locals are doing this, and only skate where they do, since they're likely to know when it's safe and where it's safe (not under bridges, for instance).
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.