Playground & railway house

Came home today from work and went straight out in my neighbourhood to do some shots.
I have to train and got to know my Canon & Tamron better. Especially how they react to different lights. Today was quite good and i had alot of fun.
Of todays photos I like this one the most. It's the playground at the Mediapark Cologne. As you can see it's build around an old railway house (Do you call it like that in english?). The new tracks are close and right behind the green hill. As Cologne is situated in the center of Germany & Europe this are some of the very most frequently-used tracks.