i'm in hendersonville, just outside nashville, and alex has invited me to a musical landmark. incredible. i can't believe i'm here. >> welcome. >> thank you so much. and the cash cabin. what is this place? >> johnny cash built this cabin in the '80s as a getaway. one of the best recording studios in the world. >> and the families were close? >> yeah, our families go back to the '50s, when johnny and roy were roommates and labelmates at sun records. >> i can't wait to learn more, and i would love to see inside. >> of course. >> this cabin has been a creative refuge for dozens of major recording artists, but it's also like home to roy's boys, and a link to their late father. what was he like as a dad? >> he was pretty wonderful as a dad. >> born in 1936, roy spent much of his youth in vernon, texas. i heard that he wrote his first song at 8? >> he definitely had his first radio show as an 8-year-old. he walked down with his guitar and knocked on the door, and he said, "yeah, my name's roy orbison, and i want to play some songs for you guys." by the end of the year he had his own