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

You’ll have to boast a particularly robust bank account to nab billionaire Bill Koch’s newly listed wintry Colorado retreat.

The post Staggering $125 Million Aspen Paradise Beats Out Romance Novelist Jackie Collins' Custom Beverly Hills Mansion To ...

You’ll have to boast a particularly robust bank account to nab billionaire Bill Koch’s newly listed wintry Colorado retreat ... at the foot of the Elk Mountains about 10 miles outside of Aspen, the ...

But remarkably, the asking price for the expansive abode pales in comparison with this week's most expensive listing—a staggering Aspen ... Billionaire seller Bill Koch and his wife, Bridget ...

The danger to the ubiquitous small boy from the habit of catching on bob sleds and cutters was demonstrated yesterday ...

Aspen City Council and the Pitkin County Board of County Commissioners met Monday for a joint work session, focusing in part on Colorado Highway 82 safety improvements, particularly at the Smith Way ...

Owned by photographer/director Francesco Carrozzini, the modernist Hollywood Hills home has curved walls and glass ...