Title shared on HN left me somewhat disappointed. The actual time appears to be "Where can you go by train in 8h?", though that's somewhat less clear. It only seems to include central stations of larger cities, though I was hoping for a list of shortest travel times between stations in Europe, as more of a thought/data experiment. Or put another way; which two train stations in Europe have the least distance between them?

Anyway, the shared feature is neat, but seems to be somewhat iffy once you get out of the bigger cities. If a route has 2 or more connections, it seems to struggle to show them. While true to its message, I still feel the restriction of 8 hours misses sleeper trains, where travel time is less essential compared to daytime trains.

It's cute for discoverability, but for a specific train search, I would definitely defer to bahn.de, which basically includes all train stations in Europe.