Seven Valleys has changed its depot's name more than once — it was a train station, then "Serenity Station," then whatever the antique shop inside calls itself these days — but the building itself never moved, sitting right where the Heritage Rail Trail still runs behind it.   The two-story clapboard structure has a wraparound second-floor porch that's outlasted every rebrand, with the gravel and rails of the old line still visible right out front. The town takes its name seriously too: seven actual valleys converge around here, which is a more literal kind of honesty than most place names bother with.   What's left is a small, hilly pocket of southern York County with direct rail-trail access and more topography than its size would suggest. Core Partners Realty can help you find a home tucked into one of those valleys.