The idea is dead simple: click anywhere on the map, and it scans your line of sight and renders all the mountains visible from that exact point in 3D.
I initially built it because I always wanted to know things like:
Can I actually see the mountain range from this street / house?
Which stretch of a road trip has the best unobstructed mountain view?
What am I actually looking at on the horizon during a hike?
Attached a quick screen recording of the current demo. What do you guys think of the concept? Any specific features or use cases you'd want to see in something like this?

You can try it here https://showmeonmap.com/mountain-finder