From ScreenRant · Greg MacArthur · · 1m 50s
Silo World Explained
Apple TV's Silo reveals how underground silos were built after a 2049 US government project.
In brief
Apple TV's Silo reveals how underground silos were built after a 2049 US government project. Apple TV's Silo series explains that 50 silos were created by a 2049 US government project after a nuclear war. Originally reported by ScreenRant.
Quick answers
- Where Are The Silos?
- The silos are located in Fulton County, Georgia, just outside Atlanta, USA.
- What's Outside The Silo?
- The surface world is deadly poisonous, with suits failing to protect against toxic air.
- How Big Is Each Silo?
- Each silo is 5,760 feet tall, equivalent to four Empire State Buildings stacked.
- How Many Floors Are There?
- The silo has 144 levels, each 40 feet tall, extending over a mile deep into Earth.
- Who Created The Silo?
- A 2049 US government project created 50 silos after a nuclear war in 2052.
Where Are The Silos?

The silos are located in Fulton County, Georgia, just outside Atlanta, USA.
What's Outside The Silo?

The surface world is deadly poisonous, with suits failing to protect against toxic air.
How Big Is Each Silo?

Each silo is 5,760 feet tall, equivalent to four Empire State Buildings stacked.
How Many Floors Are There?

The silo has 144 levels, each 40 feet tall, extending over a mile deep into Earth.
Who Created The Silo?

A 2049 US government project created 50 silos after a nuclear war in 2052.
Silo Seasons 3 Reveals Origin

Season 3 explores the origin story of the silos, connecting past and present timelines.
Changes From Books
Apple TV added The Syndrome and Flamekeepers, not present in Hugh Howey's books.
What Happens When Leaving?
Leaving the silo leads to death from toxic air, with few exceptions.
Silo Season 3 Focus

Season 3 connects the silos' origin to current events through flashbacks.
Nanobots And Nuclear War
Nanobots caused a nuclear war in 2052, with humanity nearly facing a nanotech apocalypse.
Silo's Worldbuilding Changes
The show introduced The Syndrome and Flamekeepers, key for seasons 2 and beyond.
Silo Season 4 Plans

Season 4 will move further from books while staying true to Silo's essence.
Silo's Origin Story
The silos were built by a 2049 US government project after a nuclear war in 2052.
Silo's World Status
The silo world remains mysterious, with key questions still unanswered.
The essence
Apple TV's Silo series explains that 50 silos were created by a 2049 US government project after a nuclear war.





