Some things I like most about Groningen are: the friendly people, all people bicycling, the low-brow sculpture, and the train station. You can see some of  the sculpture on my previous trip pages. At the train station you get two of these favorites. Parked outside the Groningen Centraal Station train are literally thousands of bikes. Even more bikes are parked a storage/rental building next to the station. 

The train station architecture is very intricate and fascinating, especially when the setting Sun lends the interior a beautiful red glow.

This photo below was a time exposure at dawn of the station ceiling with no tripod, so please forgive that it's out of focus.

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Here are a set of photos that show it better (not mine)....
Bicycles are more natural in Groningen than are cars in Los Angeles. The city of Groningen is a leader in city use of bikes,  Outside of China, there is no city with a larger per capita bicycle usage. Over 50% of all trips are taken on bike, making Groningen a world cycling legend.

On this trip I arrived laddened with a 30 lb duffle and a heavy knapsack, but my companions goaded me into transporting myself through town to hotel and work via bike.I took the challange. It was cool.. Here are movies of the bikes and station at dawn on my departure: Centraal Station Movie_1   Movie_2