Last year, a video was released showing a strange house inside an abandoned cave.

The owner has been building the house for over 20 years and the interior design has attracted a large number of online users.

In his youth, Grant Johnson moved to Utah, USA, where he soon bought an abandoned cave.

He decided to remodel the cave to make it livable. Over the past 20 years, he has done a tremendous job, eventually building a beautiful house of about 5,700 square meters.

Take a look at the interior of a beautiful house designed by Grant Johnson in an abandoned cave. Can you imagine living in such an unusual facility?