Here are a few photos from a tiny street called Pustegränd on the island of Södermalm in central Stockholm.
The street is just a couple blocks long and is about 130 meters in length (425 feet). A large portion of that distance is made up of steep stairs that connect the higher elevation of the island to the streets near the water.
This short video from Apple Maps shows where is Pustegränd is located in Stockholm.
Here is a link to the street on Google Maps.