Despite its fair number of inhabitants, Berne is an easy town to explore. Actually, there is one long road that crosses the old town. There you can walk under the covered promenade and admire the unique fountains.
During my stay, I enjoyed the tour to the interior of the Clock Tower the most. On this one-hour excursion, you get the chance to view the clock's medieval machinery in action.
Another rather strange place to visit in Berne is the Bear Pit. For ages, Berne has displayed live bears to remember where the city's name originated. Nowadays it's more like a zoo, but nevertheless, an interesting idea when you know that bears have been kept here for so long.