Puerta de Europa
"Puerta de Europa" is the first inclined skyscrapers in the world. This 115m twin towers are incined at 15°. In 1989, Kuwait Investment Office commisioned American architects Philip Johnson & John Burgee to design these towers. This is located at Plaza Castilla, north of Madrid. In the middle is the Obelisk designed by Constantin Brancusi. Torres KIO was inaugurated in 1996.
Today it's renamed as "Puerta de Europa" & the two leaning towers are owned by Spanish Banks (Bankia & Realia).