Absolute World Towers, Canada

Another head-turning creation from the nonconformist minds at Beijing-based architectural firm MAD, these twin residential towers (completed in 2012) are so curvaceous in design they’ve been nicknamed the Marilyn Monroe Towers. Located in Mississauga, a suburb of Toronto, the skyscrapers—518 and 589 feet tall, respectively—twist 209 degrees from the base to the top, and have already won accolades from Chicago-based Council on Tall Buildings and Urban Habitat, a nonprofit group of architects and engineers who named them the best tall buildings in the Americas.

Unusual Buildings