Why aren’t more Minnesotans talking about this state park?! 🤯 Located in📍Spring Valley, Mystery Cave is the longest underground cave in Minnesota with over 13 miles of underground passages! 🦇 Tour sign ups JUST started and the first one is 5/9. Sign up to see gorgeous pools and unique rock formations! Comment “MYSTERY” and I’ll send you the link to book a tour! Use alltrails to find even more fun trails in the state park to explore 🥾 Follow planetwithsara for more Minnesota unique gems #mnstateparks #undergroundcave #exploremn #minnesotalife #minnesotablogger