The Paik Nam June Media Bridge project—in Seoul, Korea—is more than a kilometer long (0.67 miles). It has museums, libraries, and shopping malls, but what it really needs are anti-gravity engines so it could fly to orbit.
Those ramps are not engines of any kind, however. They just lead to gardens by the river and ship docks:
Each of the bridge's floors has horizontal gardens. The building uses solar panels for energy, as well as water from the river for climate regulation.
I wish they built something similar in New York. Walking from Brooklyn to Manhattan over the bridges is nice, but this look a lot nicer. [Design Boom]