>> reporter: that's why our own sarah haynes went down under. >> this is where they did the scene, theof water comes around the corner in front of us. >> oh, himy goodness. you have the best office with a view. >> i like visitors as much as the next hobbit. >> reporter: but it's the hobbit trilogy alone which is now given as the number one reason for coming by 18% of people. >> again, one of the many translations of los angeles. >> reporter: this as chase mcneill leads tourists here, home of the movies. what is it that makes people want to come and see where a movie was shot? >> i think it's the curiosity of how the sausage is made. they're wondering how did the magician craft this experience for people. >> reporter: seen in rebel without a cause, terminator. and more recently,tly,tly,tly,t, >> they sneak into the observatory. the next is on the promenade on the outside of the planetarium. and then they sneak into the planetarium where they have a fantastical dance scene. >> reporter: chase help taking in beverly hills cop one, pretty woman. >> they want more access to that fiction. >>