6.2/109 votesLoading...#1 - Lost Pirate City Treasure
Season 2 Episode 7 - Aired 12/9/2017
When an infamous pirate city sunk into the sea after a massive earthquake, a pirate's treasure might have disappeared with it. Rob Nelson and Stefan Burns use cutting-edge technology to hunt for the legendary lost pirate treasure of Henry Morgan.
Director: N/A
Writer: N/A
6.4/108 votesLoading...#2 - Quest for the Gold Rush Fortune
Season 2 Episode 8 - Aired 12/16/2017
Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California. Rob Nelson and Stefan Burns use cutting-edge technology to search for the legendary treasure.
Director: N/A
Writer: N/A
6.5/1010 votesLoading...#3 - Mystery of the Ice Cave
Season 2 Episode 6 - Aired 12/2/2017
A strange cave freezes in the summer and melts in the winter, and a massive sand dune swallows a small child in an instant. Rob Nelson and Stefan Burns use cutting-edge technology to investigate these mysteries of the natural world.
Director: N/A
Writer: N/A
6.8/109 votesLoading...#4 - Atlantis in America
Season 2 Episode 5 - Aired 11/25/2017
New theories claim that the legendary sunken city of Atlantis could have actually been in the Americas. Rob Nelson & Stefan Burns use cutting-edge technology to investigate evidence that might shed more light on one of the world's greatest mysteries.
Director: N/A
Writer: N/A
- 6.9/1014 votesLoading...
#5 - California's Hidden Doomsday
Season 1 Episode 6 - Aired 3/21/2017
Rob Nelson heads to California to investigate a network for major fault lines that could set off an unprecedented mega-quake. Then, he explores a mysterious sinkhole that some believe is an endless pit to the center of the Earth.
Director: N/A
Writer: N/A
7.0/1012 votesLoading...#6 - Tesla's Final Secrets
Season 2 Episode 3 - Aired 11/11/2017
Nikola Tesla died before finishing a mysterious, earth-shattering invention, but the ground beneath his only remaining lab might hold clues. Rob Nelson & Stefan Burns are the first to use cutting-edge tech to investigate Tesla's underground secrets.
Director: N/A
Writer: N/A
7.1/1011 votesLoading...#7 - Doomsday Volcano of the Gods
Season 2 Episode 4 - Aired 11/18/2017
A massive supervolcano beneath Naples, Italy may be on the verge of erupting again, which could have apocalyptic consequences across the planet. Rob Nelson and Stefan Burns use cutting-edge technology to investigate this disturbing new evidence.
Director: N/A
Writer: N/A
- 7.2/1014 votesLoading...
#8 - American Stonehenge
Season 1 Episode 8 - Aired 4/4/2017
Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge. At the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.
Director: N/A
Writer: N/A
- 7.3/1018 votesLoading...
#9 - Mystery of the Serpent Mound
Season 1 Episode 2 - Aired 2/21/2017
Rob Nelson explores mysterious tunnels beneath Denver's airport and capitol building to investigate rumors of a secret organization operating below. In Ohio, he tries to uncover the ancient secrets of a mound shaped like a serpent.
Director: N/A
Writer: N/A
- 7.5/1016 votesLoading...
#10 - Capone's Escape Tunnels
Season 1 Episode 1 - Aired 2/14/2017
Rob Nelson investigates rumors of a secret underground escape route used by the infamous gangster Al Capone. In Washington state, Rob tries to uncover who -- or what -- built a vast landscape of earthen mounds in Washington state.
Director: N/A
Writer: N/A
- 7.5/1013 votesLoading...
#11 - Secret History of the New World
Season 1 Episode 7 - Aired 3/28/2017
Rob investigates ancient ruins in New England that suggest Europeans arrived in the Americas almost 1,000 years before Columbus. Then, he heads to California where a dormant super-volcano may be showing new signs of life.
Director: N/A
Writer: N/A
- 7.6/1017 votesLoading...
#12 - Rocky Mountain Monsters
Season 1 Episode 4 - Aired 3/7/2017
Rob Nelson examines a set of bizarre markings that suggest a violent clash between prehistoric beasts. In California, he investigates if a strange lake is a home to alien life.
Director: N/A
Writer: N/A
- 7.8/1020 votesLoading...
#13 - America's Buried Massacre
Season 1 Episode 3 - Aired 2/28/2017
Rob Nelson hunts for a legendary mass grave that could expose a dark secret of America's industrial past. High in the mountains, a giant lake is mysteriously disappearing, and Rob uses cutting-edge technology to find out why.
Director: N/A
Writer: N/A
7.8/1014 votesLoading...#14 - King Solomon's Treasures
Season 2 Episode 2 - Aired 11/4/2017
Priceless gold and silver artifacts are believed to be in fabled lost Temple Treasures of Jerusalem & King Solomon's hidden mines. With unprecedented access, Rob Nelson and Stefan Burns use the latest technology to search for the legendary treasure.
Director: N/A
Writer: N/A
- 7.9/1015 votesLoading...
#15 - Great Lakes Bermuda Triangle
Season 1 Episode 5 - Aired 3/14/2017
Rob descends into a cave 30 feet beneath Texas in search of evidence of a mass extinction event. Then, he heads to Lake Michigan to investigate a Bermuda Triangle-like phenomenon that has caused ships to vanish for centuries.
Director: N/A
Writer: N/A
8.1/1015 votesLoading...#16 - Legend of the Nazi Gold
Season 2 Episode 1 - Aired 10/28/2017
A legendary train filled with stolen Nazi gold is said to be hidden in Poland. Using cutting-edge technology, Rob Nelson and Stefan Burns explore deep underneath the earth's surface and in abandoned Nazi tunnels in search for the infamous legend.
Director: N/A
Writer: N/A
The Worst Episodes of Secrets of the Underground
Every episode of Secrets of the Underground ranked from worst to best. Explore the Worst Episodes of Secrets of the Underground!
A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.
Genres:RealityDocumentary
Network:Science
Worst Episodes Summary
"Lost Pirate City Treasure" is the worst rated episode of "Secrets of the Underground". It scored 6.2/10 based on 9 votes. Directed by N/A and written by N/A, it aired on 12/9/2017. This episode scored 0.2 points lower than the second lowest rated, "Quest for the Gold Rush Fortune".