For many foreigners in Germany, the ease of bike-riding here is a dream come true. Unlike in many other European countries, cycle paths grace major routes in all towns and cities and German drivers appear to be aware of cyclists' existence.
But not everyone is happy. Any good bike ride can be ruined when inconsiderate people block bike lanes with cars, signs or even mattresses.
With that in mind, three bloggers have been raising chuckles and the odd eyebrow in Hamburg with their ThingsOnBikeLanes blog - a crowd-sourced collection of the most outrageous obstacles to biking ever to spoil a cyclist's ride in the city.
The thirty-something bloggers, who wish to stay anonymous, told The Local they had started the photo blog around a year ago because they kept seeing such strange collections of obstacles on bike paths around Hamburg.
"One of the initiators had seen a construction barrier, a mattress and a dog on a cycle path all in one day and thought it would be funny to collect pictures," one blogger told The Local.
"It's meant to be funny. We never attack anyone explicitly. Number plates and faces are always pixelated," he added.
Although the blog is more of a joke than a genuine complaint, the bloggers would like to see people consider the needs of cyclists more.
When asked what could be done to improve the situation, the blogger said: "A bit more awareness for cyclists from politicians and authorities, but also from other road users would be a nice start."