Minnesota's Quarry Park & Nature Preserve claims to be the most unique county park in the US. It's certainly among the most picturesque. Featuring granite reflecting pools; mountain bike paths over billion-year-old bedrock; trout fishing; geocachers running amok; and a swimming hole 116 feet deep, four of the park's 20 quarries are now ready for scuba divers! Among the park's new dive rules, expect to:

• sign the typical permits, releases, and liability waivers;
• present your C-card and a photo ID to obtain a free Quarry Park dive permit;
• have a parent or guardian cosign the permit if you're younger than 18;
• use diving flags to alert other quarry users to your presence;
• pay for parking.

To see all 9 pages of the (pretty typical) guidelines for divers, check out this PDF. If you want to see a promotional video of the park, you can. If you want me to dive in the park's waters in the wintertime, you've got another thing coming! Brrrr.