Josh Gates Explorer treks deep into the treacherous jungles of Ecuador on a quest that has eluded historians and treasure hunters since the 1960s. His mission: to find the legendary Metal Library. It all began with a prospector named Juan Moricz, who claimed to have stumbled upon a seemingly endless cave containing perfectly carved walls, man-made architecture, and a collection of shimmering, metallic plates inscribed with mysterious symbols. The story captured the world's imagination, inspiring a major expedition led by engineer Stanley Hall and none other than astronaut Neil Armstrong. Now, Josh is following in their footsteps. He travels to Cuenca, meeting with Moricz's former attorney and archaeologists who show him artifacts from the region. Using XRF technology to analyze the metal tablets, he discovers they are made of copper suggesting they may indeed be ancient. But the real challenge awaits deep underground. Josh rappels 200 feet into the watery depths of Tayos Cave, navigating its otherworldly halls, staircases, and stalactite-filled chambers. The team follows the path of previous expeditions, mapping unexplored territory in search of the fabled library. Is this a priceless ancient mystery left by a lost civilization? Evidence of hidden treasures and advanced knowledge? Or is it all an elaborate hoax? Join Josh on this unforgettable cave exploration into one of the most remote and mysterious places on Earth. Watch Expedition Unknown Season 4 Episode 7 on Discovery Channel India. 🔔Subscribe Now! - https://www.youtube.com/@DiscoverychannelInd?sub_confirmation=1 🌍 Explore the World’s Greatest Mysteries: https://www.youtube.com/playlist?list=PLN4N_L1U4V6k5x_TLcFjME16xWvvd93Rs 🏕️ Watch Epic Survival Series: https://www.youtube.com/playlist?list=PLN4N_L1U4V6lP-kyI7OBnnCOfGHYU1t8y 👍Do Not Forget To Like, Share, and Comment on Our Videos. 📲Also, Follow Us on Social Media Facebook: www.facebook.com/DiscoveryChannelIndiaOfficial/ Twitter: twitter.com/DiscoveryIN Instagram: www.instagram.com/discoverychannelIn/ #discoverychannel #discoverychannelshows #discoverychannelindia #expeditionunknown #endlessecave #neilnarmstrong