One of the most amazing green roofs in the world is at the School of Art, Design and Media at Nanyang Technological University in Singapore. I like that this building invites you to walk onto its' roof as if it were a hill.
Saigon House by a21studio is filled with house-shaped rooms
The Transustainable House, by Japanese architecture firm Sugawaradaisuke, is a small house measuring just 38 sq m sq ft). It sports a facade that rusts over time, and a flexible interior that can house up to three groups of people at once.
CAZA's 100 Walls Church is surrounded by staggered walls