I had the pleasure of watching these DVDs on BluRay. Unbelievable. The title of the series really sums it up -- it takes you on a journey to almost every height and depth and climate on earth, and familiarizes you with so many amazing plant and animal species. The footage is colorful and just magnificent. Don't mean to speak in superlatives, but it's really very impressive. An incredible, unparalled work that would be an amazing gift to give anyone.
It's very entertaining because so many of the scenes they show (like a slo-mo capture of a Great White attacking a seal) is just awe-inspiring. Plus, it's educational. Maybe more people watching it would encourage people to be more eco-conscious to preserve our precious planet.