4 Days And $500, What Can You Do In Minnesota?

So, I've got a rare, four-day freakin' weekend coming up!  The original plan was to go to San Diego, but since that plan is dead, me and my chica still want to make it an awesome weekend somewhere closer to home!  So we need your help!

Dunken's post this morning on the "Coolest Small Towns in Minnesota" was a good start! But if there's anyone who knows what's good in Minnesota, it's Minnesotans (no offense, Dunken)

So here's the challenge:  I've got 4 days and $500.  What's there to do for a party of 2?

GO! (and keep it appropriate!)