The entrance of the silo was once covered with this metal plate, which was obviously pried open for others to view.

There wasn't much lit inside, but there were countless Black Widow spiders laying in wait.

Gliding past the spiders, the friends headed for the stairs, relying solely on the lights of their camera.

Wherever they went in the silo, they found creepy, strange black paintings like this one.

They eventually found the blast door. However, upon review, it was clear that someone had been here first...with a plasma torch.

They found more graffiti inside, which some believe comes from the 1980s.

Arrows leading the way to control rooms.

It was here where they found the most interesting thing of all... "In the control rooms, there were old plumbing fittings in the floor, as well as broken down wooden walls with carpeting," according to the explorers. "In the wooden floors, there were holes labelled 'HELL.' These holes had grey and black paint and smelled like rotting flesh. Also in the control room was a massive cement cone pointing downwards. The sign on it read '40 tons of sand. Release in case of emergency!' If there was ever a problem down there, the scientists were trained to release the sand into the silo and climb the hatch where the mass of sand used to be. The cone is still filled with sand from the surface, but we haven't found the release lever...yet."

As they left the control room, the explorers moved throughout the silo, continuing to find interesting "art."

They went through more blast doors...

Until they finally had enough. The group left using the same staircase they entered...except with a parting message.