If I catch myself heading from point A to B on the Damstredet side of town, I will always alter my route so it passes through this meandering delight of a street. The cobbled road is lined on either side by adorable, brightly-coloured wooden houses. Most of them date back to the early to mid 1800s, but the very oldest parts apparently go back to the 1600s.
The architecture’s really different from the rest of Oslo; only one other similar street remains (Telthusbakken, slightly further up the hill).
Damstredet cuts down from the south-eastern part of Oslo’s historic graveyard, heading down towards the river (check the Akerselva article). On a nice day, friendly locals enjoying the sun and a coffee on their front steps will greet you as you pass by. Take care in winter though, this little slope gets treacherous!