Complex City, Nevada

 A remote ranch in Garden Valley, Nevada is where the artist Michael Heizer has been building his City complex since 1972. The mile and a half long artwork is now within the Basin and Range National Monument, a 704,000 acre wilderness area, established by President Obama in 2015. Eventually the sculpture will be open to the public, but for now it remains off limits, behind a locked gate, the Area 51 of Land Art.