Castelpietra (Sprechenstein) isn't often mentioned by name. You're more likely to hear about Pietra Castle. This small hamlet is primarily known for its imposing castle, perched dramatically on a crag overlooking the Upper Valle Isarco, between Campo di Trens and the "Sterzinger Moos" marshland, opposite Tasso Castle. There's also a biotope that bears the Castelpietra name.