In addition to the oldest university (1477) in Scandanavia, Uppsala has Scandinavia's largest church, Uppsala Cathedral (1260), which is still an important religious center of Sweden.
Outside the city, in Old (Gamla) Uppsala, there are ancient royal burial mounds that are popular with visitors (I did not get to see them on the rainy day of my visit) that still hold many mysteries, such as why were the mounds built? and why at Uppsala?
I stayed in the center of town (the burial mounds are just north of downtown), and strolled several square blocks of shops, cafes, and restaurants.
Uppsala Castle is a must-see. You can't miss it and Uppsala Cathedral facing each other on a beautiful hillside.
The Fyris River runs through the center of Uppsala, and provides scenic views of bridges, footpaths, and outdoor markets.${QuickSuggestions} ${BestWay} To get to Uppsala, take the train from Stockholm's Central Train Station (T-Centralen). The 40 minute train ride costs 70 SEK ($7) each way. Most of the places to see are east of the Train Station at Uppsala.
Once you get to Uppsala, everything is accessable by foot or bicycle. Outside the train station, you will see oceans (thousands) of bicycles everywhere.