I don't know if there is something alike in all the world. For me, it was the first (and last) time that I crossed a strange men's work that starts being a bridge and, suddenly dives into the sea to become a tunnel. Expensive toll, of course, but a clever solution and a different experience, putting Sweden only minutes away, without restrictions for ships.
Easy and Pleasant
The most comfortable way to visit the town is to take place in one of the low boats that navigate the canals, listening to the explanations of the most remarkable details of the monuments and public places. If, in the beginning you may complaint for the low level of the boats, that sometimes impeaches a good sight of the buildings, but you will finally discover, passing under some bridges, that they have exactly the centimeters allowed by the space. And... mind your head...
Address: Located along the Canal and the Harbor