The main feature is much shorter than the 60 mins claimed by Amazon. The cave selection is bizarre, covering the Grand Canyon (not known for its caves), glacial crevasses (not caves at all) and Yucatan's flooded caves. Whilst the footage is all very spectacular, the soundtrack is unbelievably poor. Overloud sound effects and mangled Moody Blues songs are interspersed with dialogue than can only be described as idiotic. The dialogue generally takes the form of an audio diary to one of the presenter's junior school classes and is an insult to their intelligence.
If you buy this DVD, turn the sound off and watch it to Laura Veirs' excellent song Spelunking (Americanese for caving and potholing).