Groningen's city centre is surrounded by canals, which are basically the lots for some amazing houseboats. Sometimes I take a better look at them, and I had to giggle when I saw this one, which has a serious relax situation going on outside.
Houseboats are pretty common in the Netherlands, they have been part of the Dutch townscape for centuries (17th century), and in Groningen we even had an election of the prettiest houseboat. You can check the contestants out on this website. I have the idea that houseboats have been gaining popularity lately, seen the fact that even students like to rent rooms in this extraordinary type of accommodation.