Hidden Beneath the Cities “Crystal Cathedrals and Buried Bunkers” S1E2 April 24 2026 on National Geographic

On Friday April 24 2026, National Geographic broadcasts Hidden Beneath the Cities!
Crystal Cathedrals and Buried Bunkers Season 1 Episode 2 Episode Summary
The upcoming episode of “Hidden Beneath the Cities,” titled “Crystal Cathedrals and Buried Bunkers,” promises to take viewers on an exciting journey into the underground world. This episode, airing on National Geographic, will showcase the incredible discoveries made by scientists as they explore salt chambers, ancient bunkers, forgotten kingdoms, and mysterious caves.
In this episode, experts will delve into the hidden layers beneath various cities. They will reveal how these underground spaces have shaped the history and culture of the areas above. The exploration of salt chambers will highlight their unique formations and the role they play in the environment. These natural wonders will be presented alongside man-made structures, such as bunkers, which tell stories of past conflicts and strategic planning.
The episode will also focus on the remnants of old kingdoms, shedding light on civilizations that once thrived underground. Viewers can expect to see stunning visuals of ancient architecture and artifacts that have been preserved over time. The mysterious caves explored in this episode will add an element of intrigue, as scientists uncover secrets that have been hidden for centuries.
“Crystal Cathedrals and Buried Bunkers” aims to captivate audiences with a mix of science, history, and adventure. The discoveries made in this episode will not only educate but also inspire curiosity about what lies beneath the surface of familiar cities. This episode is sure to be a fascinating addition to the series, inviting everyone to look deeper into the world around them.
What Time is the “Crystal Cathedrals and Buried Bunkers” Episode On?
The Crystal Cathedrals and Buried Bunkers episode of Hidden Beneath the Cities will be broadcast on April 24 2026 on National Geographic at 10:00 PM at ET/PT.
Is the “Crystal Cathedrals and Buried Bunkers” Episode New?
The Crystal Cathedrals and Buried Bunkers episode of Hidden Beneath the Cities is all new!
Hidden Beneath the Cities Crystal Cathedrals and Buried Bunkers Cast & Stars
No cast information available yet.
Crystal Cathedrals and Buried Bunkers Episode Videos & Previews
Watch Hidden Beneath the Cities Crystal Cathedrals and Buried Bunkers Online
Watch Hidden Beneath the Cities on National GeographicHidden Beneath the Cities Series Information
“Hidden Beneath the Cities” is a documentary series on National Geographic that explores major cities around the world by using investigative reporting and advanced technology to uncover what lies below street level, including hidden tunnels, lost structures, and buried historical sites. Each episode focuses on a specific city or landmark, combining archival research with expert analysis and reenactments to explain how underground environments formed and what they reveal about the past. The program is generally structured around factual findings rather than a single continuing narrative.
