and they're doing the best they can. it means a lot to all of us. d> merry christmas! ir reporter: this may not be the only holiday firefighters spend on the fire line. they could still be here for new ekar's with the flames not expected to be put out until first week of january. vlad? >> duthiers: jamie yuccas, thank you very much. in northern california, a grove of redwoods that has stood tall for 1,000 years is now threatened by an onslaught of tourists. don't ask where this grove is. state park officials won't say. but john blackstone was given a private tour. >> what a place to work. >> it's not a bad office. >> reporter: entering the redwood forest is like stepping back in time, among all the towering trees. the exact location of the tallest, named "the grove of titans," has long been kept secret to help preserve them. >> our long management philosophy is we're not going to tell people. we're still not telling people. >> reporter: brett silver has agreed to lead me to the titans, home to some of the largest trees in the world.