vintage doors mounted on barn door hardware. This could be done in place of the french doors we have in our office. It would really save space and make the room more usable (think external pocket doors).
Check out this cave-style door! This door is an entrance to a dwelling tucked away amidst sand-dunes and coconut palms on a beach in Kenya. It is owned by designer Marzia Chierichetti who also created this retreat. How fun!