Hidden in plain sight, just minutes from the glittering Las Vegas Strip, lies one of the most extraordinary and storied residences in the United States: The Underground House at 3970 Spencer Street. On the surface, the property looks like an unassuming estate with a traditional two story 2 bed/2 bath home, set on over an acre and a 4-car garage. But descend 26 feet below ground, and you step into another world entirely—an astonishing 14,620 square-foot subterranean space with a +/- 4,100 sf 3 bed/4 bath house w/ casita, built to last, rich with history, and brimming with business potential.