This is Reykjavik's main street, running along the city center. It is about 2 km long. In 2011, it was partially converted into a pedestrianized street with no car traffic. There are many boutiques, clothing and jewelry stores, drugstores and art galleries. There are also numerous restaurants and cafes with outside tables.
The street was built in 1885 and is one of the oldest streets in the city. Its name refers to the hot springs where local women did their laundry until 1930. The street can be visited with a local guide.
There are two museums here. The first is the Icelandic Penis Museum, which houses 280 exhibits showing the penises of the difference of animal species and two human organs. The second one is a small but atmospheric Punku Museum.