This is the series of Batman graffiti that Redditor sneakylawyer (aren't they all?) found while "urban exploring" (read: smoking weed in abandoned buildings) around Belgium. Apparently all the murals were painted by a guy named Pete. Although I suppose we can't rule out the possibility they were painted by somebody else who just signed the name Pete to throw us off his trail. I do that sometimes. Like when an apartment neighbor's music is too loud I'll usually write a real passive-aggressive note then tape it to their door signed with the name and apartment number of the person who lives on the other side of them. Plus sometimes I'll fill a Ziplock bag with flour then push it half under their door in the middle of the night and stomp it.
Keep going for the actual paintings.
Thanks to Todd, who wishes he had an abandoned building nearby to practice his graffiti in. Me? I want a pottery wheel.