1.Cave House in Festus, Missouri
This Modern day marvel and energy efficient 15,000 square feet home is built between sandstone cave in Festus Missouri. The underground house was built by Curt and Deborah Sleeper and features home interiors that blend with the natural unfinished sandstone walls. Thanks to its geothermal heating and clever design, the owners of this magnificent home do not need air conditioning or a furnace to heat/cool the home. This space was previously used as a concert venue and a roller skating rink! It’s gained fame by being auctioned on eBay before finally becoming a private residential residence. If you thought this was fascinating find out how magnificent the next home is.