With billionaire Bill Koch's net worth of $2.8B, as stated on Forbes.com, it is not a surprise to see him having luxury properties worth millions. Among them is an Aspen Ranch in Colorado currently listed for $100M, reports Zillow.

The listing agent for the the Bill Koch estate is Craig Morris of Aspen Snowmass Sotheby'€™s International Realty.

According to the listing from SothebysRealty.com, the coal-based company magnate is selling his Aspen property, known also as The Elk Mountain Lodge Properties. The whole estate totals an 82.6 acres of land with 13 buildings, including the almost 15,000 sq.ft. main lodge, single family homes, cabins, and recreation maintenance facilities. There are 28 bedrooms, 25 full baths, and 5 half baths in the whole compound.

Basing from the photos provided by Zillow and Sotheby's listing, the property offers much luxury, comfortability, and state-of-the-art lifestyle.

The interior boasts of impressive craftsmanship with wooden materials lining the floors and ceilings. For the main lodge, massive logs are lining the walls, along with some rocks.

The kitchen has modern furnishings and is spacious for a master chef to cook. The property has a state-of-the-art exercise room which offers various modern gym equipment. Yet the ceilings and floors are still lined with wood, reminding the guests of Aspen's natural appeal.

Even the guest rooms have been designed flawlessly, almost at-par with the host's home features.

With such an expensive retreat house, the owner made sure to equip it with security home automation systems for everyone's safety, notes Zillow.

The estate of Forbes current No.167 richest man in the world, based on net worth, offers several recreation amenities as well. It has an entertainment hall, an indoor sports court, a walk-in temperature humidity-controlled wine room, and multiple spas.

However, nestled in the Castle Creek Valley, its most charming feature is the magnificent view of the surroundings. According to the the overseer of Koch's personal properties, as interviewed by Forbes, it is all about the view.

"In essence, it's 90 to 95% new," said Mark Curley, CEO of Centurion Residential Services.

Curley also disclosed to Forbes that Koch just bought it for $26.4M in 2007 but already spent more than $100M on renovating the property. It was only listed at $90M that time.

Curley said Koch is selling his property because he barely spends time there. Koch also has several estates to take care of like a $19.5 million Cape Cod estate he bought in 2013, and a 50-building replica of a Wild West town on Koch's Bear Ranch in Paonia, Colorado, where the President of Oxbow Carbon usually stays.

Take a tour with this video: