Aspen, Colorado, is America's most expensive ski town — but it gets even pricier the more skyward you get.

Towering over Aspen is Red Mountain, also known as "Billionaire Mountain." It's home to high-end real estate, with sales prices as high as $49 million, staggering square footage, and scenic views of downtown Aspen and the surrounding mountains.

Read more: An anonymous buyer just broke 2 Aspen real-estate records by dropping $24.2 million on a ritzy 'Billionaire Mountain' lot — and it's totally empty

It's a haven for the 1%. From the candy mogul William Wrigley Jr. to the casino magnate Neil Bluhm, many notable names have had a home there.

Here's a glimpse at what life (and real estate) is like on Billionaire Mountain.