Not to be Debbie Downer, but there are actually three security cameras in there. Maybe that'll add to the fun, though.
Best Make-Out Spot Minneapolis 2009 - Walker Art Center's Sky Pesher
A make-out spot underground may not sound too romantic, but hear us out. Hidden on the Walker Art Center hill is a small walkway that leads into what looks like a giant bomb shelter in the side of the hill. Trust your curiousity and venture in. Once inside, you'll find an underground room lined with benches and a giant sunroof as the center point. Created by James Turrell, the installation is meant to create the optical illusion of "bringing the sky down." Check this place out just before sunset or sunrise for the best experience. If it's a quiet day, you'll probably have the space to yourselves, which could turn into some serious smooch time. If it's busy, just bring a blanket and spread out on the Walker hill for a romantic view of the skyline.