I see a podium in this picture thats facing the flowing water. I'm thinking this is where the president candidates start their journey. If they don't say anything that top officials like, they get toss down through the flowing water stairs. The next candidate walks up the steps on the side and the cycle repeats.

Maybe gas station?

an open door but it's far away?

Back of a car ?

Looks like a door to an apartment

A Garage door

White board in a classroom or Office

It's the view to an balcony?

hahahaha very nice

First clue: