Its called “The Hemloft” and its an egg shaped tree house built by Joel Allen located in Whistler, British Columbia, Canada.
Here’s how he described the inspiration behind his design:
“The driving force behind the whole thing was a simple, yet inexorable desire to build something cool. There were no practical motives or profound meanings … And building with free materials wasn’t out of some principled ideal, it was just the only avenue I could afford. … In the end, I was mysteriously compelled to build something cool, something beautiful.”