One of my all time favorites.

Best movie of this year hands down!

While it doesn't offer any answers, it both thrills and makes you think.

The movie is made so realistic it has a lot of that WoW feeling at the right moments and never tooo over the top. the suspense is done so well and the emotion is felt. Very well put together with the music and all.

I found this show to be very interesting. However, the host is quite repetitive, and I would have liked to see more EXPERT commentary. He often spouts off vague explanations and seems unsure if we are looking at a cemetery/hippodrome tunnel/ royal courtyard/ lavatory. you get the idea. I also have a penchant for dark spaces so I really feel at home watching this show. However I feel like they could have spoken more about the creatures that live down there, since they are obviously not abandoned. If you pause at 3:40 in the Instanbul video you will see traces of scat. I would have enjoyed it if the narrator had identified the scat and given more insight into what animals live down there (cats). Overall, the imagery makes the show interesting enough to keep me watching. would bump up rating to 8 with more cats.7.5/10

I stumbled over "Cities of the Underworld" while browsing around on Youtube and I was hooked right from the beginning. What a great show this is. Both hosts in my opinion do a really great job by doing their spelunking trips with a lot of fervor and enthusiasm and you can tell the people they talk to are getting excited as well, so their enthusiasm seems to be quite contagious. Some of the scenes are a tad over the top ("We are the first ones going down here, so we do not know what we will see" or the one in Berlin where the host enters for the first time a bunker on his own), but so what, no damage has ever been done by some showmanship. I myself have been in some of the described caves and underground structures and from the few I have seen I have to say that the description given by the host is usually very accurate and reliable; so while it is mainly good fun to watch the show, you might actually learn something from these shows. I can fully recommend this show and I can only express my misery of having not been asked to do this show. I would have done it for free :)

Rarely does a documentary show something you have never seen before. Almost every episode of "Cities of the Underworld" reveals underground wonders I was unaware existed. Season one was tremendous, covering cities of both the New and Old World. Each episode is set up with a brief history of the region, and the guides are interesting, and informative. As for the hosts, they are not abrasive as some others have claimed, perhaps a little over enthusiastic, but still totally acceptable. I like the way Eric Geller and Don Wildman ask to go beyond the obvious in their explorations. Without question this is the best documentary I have ever seen, and I hope there are many more seasons to come. - MERK

I love the show, and I normally don't comment but I feel the need to speak up. Eric Geller did an excellent job as the host. A major part of the reason I watched the show, was due to his enthusiasm. Yes, there was a certain amount of reiteration, but this is done for the slower members of the viewing audience. His zest and obvious interest is what he is doing, is so lacking from some shows out there. When the host is obviously bored by the topic, and isn't having fun, the viewers won't have fun. I read a rumor that the History channel has renewed for another season. I hope they bring Eric back, and allow him to continue to have fun with the show and share his joy in the topic.