Billionaire Bill Koch has put his 16,600-square-foot log mansion on 52 acres in Aspen up for sale for $125 million.

Business Insider's reporter spent five days in Aspen, where she saw a Champagne-sabering ceremony and a dispensary selling ...

Casino mogul Steve Wynn joined forces with his billionaire neighbor to buy a home in Aspen, Colorado ... with most of those ...

When it comes to ski towns, Aspen, Colorado, is as expensive as it gets. Real-estate prices are sky-high, and visitors shell out hundreds for hotels and ski passes. From a $51 million mansion to a ...