Just like the title says, I am curious about what way you guys get inspiration for  a map. Like a website with cool pictures, etc.

its called people with a huge imagination
Some people imagine creative things, those people are called creative people.
Other people have an imagination of different things, creative, or other kind of minds, you get the point.

And then inspiration comes in from other people or images, or real vision in the real world.

That's how you do it         

I also guess most of the people on this forum have played with a lot of LEGO, did that myself and made the hugest things u ever can imagine after that i made those creations my brother came by and crushed it

Two words: Concept art

Fever dreams, drug use, and sex with roadkill.