Jonathan and Todd take a ride across the Portuguese countryside to find one of the longest caves in Europe. And it happens to be hidden right behind an old toilet paper factory. JONATHAN BIRD'S BLUE WORLD is an Emmy Award-winning underwater science/adventure series featuring underwater cinematographer/naturalist Jonathan Bird. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ● Subscribe to Blue World https://www.youtube.com/c/BlueWorldTV/?sub_confirmation=1 ● Become a Member https://www.youtube.com/channel/UCFH-Qa1s6rQRTrQjFg8N84Q/join ● Check out our Extras Channel https://www.youtube.com/channel/UCXRF_NqOUBJszlmqBJVBkYA ● Blue World Merch http://www.blueworldtv.com/shop ● Support us on Patreon http://patreon.com/BlueWorldTV ● Instagram https://www.instagram.com/blueworldtv/ ● Facebook https://www.facebook.com/BlueWorldTV ● Twitter https://twitter.com/BlueWorld_TV ● Website http://www.blueworldTV.com ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ #scubadiving #cavediving #portugal Chapters: 0:00 Intro 0:29 Riding to the Factory 2:18 Preparing for the Dive 4:09 Entering the Cave 6:22 Exploring the Cave 14:13 Summary 14:53 Credits