Show HN: UpToWhere – Visualize What You Can See from Any Point on Earth

The idea came to me after spotting the sea peeking through mountains on a drive near Barcelona. It left me wondering what else was visible from different locations.

Some of the features I later added include 3D maps, sun path calculation, adjustable elevation (calculate from a drone/plane POV), and mountain detection.

To celebrate the launch, the first 100 HN users can get 1 month of free premium access with the code: UTWfirst100.

I’d love your feedback, questions, and suggestions. What would you use this for? What features would you like to see?