Miami is a fast-developing city, where old buildings are quickly demolished and replaced with shiny new ones. But the 25,000-acre Aerojet Dade Rocket Facility, an industrial relic of Miami's past, has remained virtually untouched for decades. In the 1960s, Aerojet manufactured rocket boosters here, but the plant was shut down in 1986 after the company lost its contract with NASA. Now the facility sits empty, rusting away and unprotected. It's a popular place for scrap metal thieves, graffiti artists, and young urban explorers looking for a weekend adventure. Three miles into the facility stands a building that houses a silo with the SL-3, the world's largest solid-fuel rocket booster ever built. Exploring Aerojet's factory isn't exactly legal — but then urban exploring wouldn't be half as much fun, would it?