I would recommend to do this early in your stay as the guided tour helps you to get orientated with Bruges.
The carriage will ride along the canals and historical small bridges.
Along the way you'll find many picturesque corners, several museums and other historical sites. The horse will make a stop halfway at the Beguinage.
The carriage driver provides explanation and gives lots of useful information about various sights, he shows the location of Bruges' top attractions and shares interesting facts about the city during the tour.
The carriages are well enough equipped for a tour in all weather conditions, blankets provided for the cold and a roof top for the rain.
Pick the carriage up from the main Market square (on Wednesday before noon on the Burg), go early to avoid queues.
Price is 50 € per carriage, for half hour, you can fit up to 5 people into the carriage.