Mountain Mansion, Colorado, United States

This mansion has 7-bedroom-6-bathroom and costs $29.5 million.
Mansion
A mansion is a very large dwelling house. U.S. realtors define a mansion as a dwelling of over 8,000 square feet (740 m2). A traditional European mansion was defined as a house which contained a ballroom and tens of bedrooms. Today, however, there is no formal definition beyond being a large and well-appointed house.