His long career is marked by features with oddly fascinating subjects and characters -- for example, Even Dwarfs Started Small (1970) is set in a prison populated entirely by dwarves and midgets -- but he's also well-known for his documentaries. My Best Friend (1999) explored the director's often tumultuous relationship with German actor Klaus Kinski, who starred in the Herzog masterworks Aguirre: The Wrath of God (1972) and Fitzcarraldo (1982).
The documentary Grizzly Man (2005) also generated significant buzz by relaying the unimaginable fate of a grizzly bear activist who was killed by the same animals he worked his whole life to protect.