This episode investigates whether remote islands worldwide conceal evidence of extraterrestrial activity, focusing on mysterious underwater objects and unexplained phenomena around isolated landmasses. The show highlights a 1963 U.S. Navy encounter off Puerto Rico, where the USS Wasp fleet tracked an unknown sonar target traveling at 150 knots and descending to 27,000 feet—speeds and depths theorists like Richard Dolan and Mike Bara argue exceed any known human technology, then or now. Ancient astronaut proponents suggest islands serve as ideal locations for hidden alien bases, citing centuries of reports describing "fiery wheels" over places like the Isle of Man, megalithic structures with legends of flying stones, and USO (unidentified submersible object) sightings near volcanic islands. The 1945 Aleutian Islands incident, where USS Delarof crew reported a dark spherical object emerging from the ocean near Adak, adds another layer to the pattern theorists claim spans both history and geography.
Mainstream oceanography and naval analysis attribute such accounts to misidentified natural phenomena, experimental military technology, or instrument errors—noting that extreme ocean depths create challenging sonar conditions and that classified Cold War-era submarine testing could explain unusual readings. The episode remains compelling for skeptics because it engages with documented military encounters that generated official reports, raising genuine questions about ocean surveillance limitations and how pre-satellite era navies interpreted unfamiliar readings in an age of rapidly evolving submarine technology and heightened military secrecy.
Aleutian Islands
United States · Native Alaskan
Theorists argue that the Aleuts' origin legend of descent from a creature that fell from the sky, combined with persistent UFO sightings including a 1945 incident where 14 soldiers witnessed a dark round object rise from the ocean near Adak, points to an extraterrestrial base hidden in the volcanic islands. Mainstream scholars interpret the Aleut origin story as traditional mythology and attribute the 1945 sighting to wartime stress and misidentification.
Easter Island / Rapa Nui
Chile · Polynesian (Rapa Nui)
Moai statues moved through anti-gravity or levitation technology
Guadalcanal, Solomon Islands
Solomon Islands · Modern
Theorists claim that legends of giants traveling through subterranean tunnels, eyewitness accounts of UFOs rising from the ocean and entering mountains, and a 1998 report of a bulldozer blade moved by giants all point to an extraterrestrial base hidden in the mountains and underwater near Guadalcanal. Mainstream historians and anthropologists attribute the giant legends to local oral tradition and folklore, while the UFO accounts remain anecdotal.
Island of Adak
United States · Modern
Theorists point to a 1945 incident where crew members of the US Army transport Delarof reported a dark round object rising vertically from the waters near Adak, circling their vessel two or three times before vanishing, as evidence of an alien underwater base. Skeptics attribute the report to wartime misidentification or atmospheric phenomena.
Island of Umnak
United States · Native Alaskan
Theorists highlight the Aleut legend that a celestial creature fell to Umnak and produced ancestors of the Aleut people, suggesting this origin story reflects extraterrestrial seeding of humanity. Mainstream anthropologists classify the legend as mythological narrative explaining Aleut cultural identity.
Isle of Man
United Kingdom (Crown Dependency) · Celtic
Theorists argue that legends of the Tuatha Dé Danann, the 'Little People,' and a 2,500-year-old report of a fiery three-spoked wheel descending from the clouds all point to ongoing extraterrestrial contact, with the Little People's kidnappings paralleling modern alien abduction accounts. Mainstream folklorists interpret these legends as Celtic fairy lore and early astronomical or meteorological descriptions misread as supernatural events.
Nan Madol
Micronesia · Saudeleur
Venice of the Pacific — built on artificial islands using massive basalt columns
Plain of Jars
Laos · Buddhist/Hindu/Islamic
Thousands of giant stone jars — some weighing up to 14 tons — scattered across the Laotian plateau with no explanation
Puerto Rico
United States (territory) · Modern
Theorists claim there has been a tremendous surge of UFO sightings in Puerto Rico since the early 1990s, with witnesses convinced there is a massive futuristic alien installation deep below the island under the ocean bed. Mainstream analysts have not confirmed any anomalous underground structure.
Sandy Island, Coral Sea
Unclaimed / disputed · Modern
Theorists contend that Sandy Island's presence on maps since Captain Cook's 1774 voyage and its absence when researchers arrived in 2012 suggests either alien cloaking technology making the island disappear or that the island itself is a technological alien craft that surfaces and submerges. The University of Sydney research team concluded the island's appearance on maps and satellite data was the result of accumulated cartographic errors and faulty data sets, with ocean depth at the location measuring 4,600 feet.
USS Wasp Incident Site, 75 miles off Puerto Rico
United States (territory waters) · Modern
Theorists argue a 1963 US Navy sonar contact tracked an unidentified submersible object moving at over 150 knots and descending to 27,000 feet, far beyond any known human technology then or now. No mainstream explanation for the specific contact has been publicly confirmed; the Navy was conducting routine anti-submarine maneuvers.
Yonaguni Monument
Japan · Unknown / Possible Natural
An underwater stone structure off Yonaguni Island appears to be a man-made pyramid and terrace complex
“Islands are essentially”
“There is nothing in any”