Image: jdwfoto / shutterstock.com Legal Walls is a free global directory of spots where you can spray without getting arrested. The website plots each location on a world map with clickable markers — zoom in on any one to pull up a Google Street View, read community notes, and see whether the wall is still active. You can search by city or region to scope out what's available nearby. The site currently lists 2,522 sanctioned spots in total globally, with Europe leading the count by a wide margin — worth bookmarking before any trip abroad if you travel with spray cans. Make sure to use your own best judgment when deciding to paint on one of these walls, and double-check that it's still legal before you show up with your gear. Click on any listing to read people's comments about the location. There's also a way to rate an area as still safe to paint, which helps keep the database up to date.…