This is a drawing of Parker Dam I started at Joshua Tree NP. At the time we visited, the dam wasn't holding any water back. Instead it just felt like a remnant of some ruined building.
I didn't get very far in the drawing but kept drawing over it in my spare time for the last couple of months; waiting for renders, sitting on a bus, on lunch breaks, etc. I ended up changing the scale quite a bit and adding in details that were never there. I like drawing because it allows me to go places that don't exist.