National Geographic Channel examines various UNESCO World Heritage sites. IMDB states that this had two seasons and seventeen episodes overall. Each episode does one site. It's not only a travelogue. The main difference between this and other travelogue shows is the people behind the scenes trying to maintain these sites. It's fascinating at times. At other times, it's a little boring. For some reason, I liked the pipe work at the Palace of Versailles. There's no rhyme or reason. It's a good show for both National Geographic and UNESCO. It's good to see the work behind each one of these sites.