Two Polish architects, Irek Glowaki and Marek Rozanski, wanted to do something totally different with their latest project - turn the world upside down!
Literally. They made a house that's constructed completely upside-down.
To go into this strange house, you have to go in through the roof and walk on the ceiling. It's a really weird experience that might make some people feel dizzy!
The house is in Terfens, Austria, so you may not be able to actually go to see it. So we've added some videos and photos so you can see what it's like to walk through an upside-down house.