lit up city skyline 
concrete slab next to the water
a square, manmade body of water. which type i do not know, although i'm pretty sure it's on a roof. so: swimming pool
this is time lapse photography, that's why you have the green+purple+yellow lines across. but some of the time lapse doesnt make sense, so i'm assuming the time was something like a minute. anyway.
a reddish brown sky, brightened+coloured by all the skyscraper+business district lights
what i think is probably concrete, darkly painted, surrounding the angled pool on the roof
The picture is taken at night.
The buildings are tall.
The lights are on.
The lights are bright.
A city sky line.
The buildings have lights in them.
Cityscape at night
a large body of water near a river at night with tall buildings on the far side