“Almost five decades ago, Los Angeles architect John Kilbane set out to craft his very own oasis — one nestled amid a secluded canyon, and effortlessly commingling with the natural surroundings from every vantage point in and around the three-level home. Now the striking residence known as the “Corfu Treehouse” has popped up for sale in Bel Air, asking a speck under $5 million.“This is one of my favorite properties in L.A. on the market right now because it is so unique and peaceful,” says Daniel Milstein, who is co-listing the place with Aaron Kirman, both of AKG | Christie’s International Real Estate. “It has this charming feel to it with incredible energy. The architecture is breathtaking and works perfectly in this unique abundant space.”