I need a background of a tall block building

[lazy_donut]

Hey! You can find what you are searching here (the sites are free):

Background sites

www.pexels.com
www.pixnio.com
www.pixabay.com

Backgrounds shops

Zombie Arts - Art Shop: We make free covers, art scenes etc

LunaLillies Art Shop! [OPEN] We Do Free Art Scenes, Edits Etc

SnowFlake’s Art Shop [OPEN]