This is a former Soviet weapon testing site in the Caspian Sea where time now stands still.
Eerie drone footage shows the now-abandoned Dagdiesel plant sitting at Russia's southern republic of Dagestan, overlooking Kazakhstan.
The site once served as a compound for workers who developed torpedoes and other naval weapons.
The 5,200-square-metre facility, also dubbed as Russian Fort Boyard, is left with infrastructures made of reinforced concrete foundation and metal.
But it was once a glory working site for workers, sitting at 2.7 kilometres off the coast.
The Dagdiesel plant came with a hotel as accommodation and leisure facilities such as a library and a basketball court.
The compound, built in 1939 and officially closed in 1966, featured a three-floor complex with a lookout tower.
It had all the mod cons for the period, including comfortable quarters and parquet floors.
In a feat of engineering, the underwater section, also known as the "Array," was built by the coast and floated to the construction site before being sunk.
The site has been empty for over 50 years and is now a shell of its former glory.
The impressive metal island has now become a hotspot for thrill seekers looking for an adventure back in time.
