The large 'rock' in Shyllien

For many monsters, aggro is avoidable under certain conditions (if you stay in normal mode(not combat mode), succubi and regular wolves don't aggro, and Baol Infil monsters only single aggro; wisps aggro you slower if you're unarmed; iirc golems have a shorter aggro range if you walk instead of running; and Peaca ghosts don't seem to notice players using playdead if they don't talk or use pets.) There are probably similar tricks for the monsters guarding this stuff.