There is a place up in the Colorado Mountains near my parents house where a family named Bishop have built a castle out of stone. Bishop Castle was built from the ground up by this one family since 1969, I believe, and is still under construction. Visitors can come view and walk through, at their own risk. This is a view looking up to the windows on a higher level. This place is incredible.
Here is a larger view of the castle itself. That's my stepdaughter walking up the stairs in the front to my husband and stepson on the landing, and my parents can be seen in the lower right corner.