The Lucky Knot Bridge is a pedestrian bridge spanning a highway and a river in Changsha, China. Designed by NEXT Architects, the Lucky Knot Bridge design won the international competition to design a bridge for a New Lake District park in 2013. NEXT Architects' design was inspired by the art of Chinese knotting and the Mobius ring. In ancient Chinese art, the knot symbolizes prosperity and good luck. Meanwhile, the Mobius ring is a surface with only one side and only one edge. The combination of these two arts formed the 600 foot long and 78 foot tall bridge that appears to cross over the highway and river in three distinct paths. However, like the Mobius ring that inspired it, the bridge is actually only one surface in a continuous loop that has no set beginning or end. Painted bright red as a symbol of good fortune, the bridge has eight street entrances and five connection points between the three interwoven crossings.

Sources:

Garfield, Leanna. “China's topsy-Turvy bridge actually has three bridges woven into one.” Business Insider, Business Insider, 11 Oct. 2017, www.businessinsider.com/china-lucky-knot-bridge-photos-next-architects-2....

Next Architects. “Lucky Knot.” NEXT Architects - Next Projects - Bridges - Lucky Knot, www.nextarchitects.com/en/projects/lucky_knot?c=bridges.

Image Source: By David Benbennick (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

For pictures of the Lucky Knot Bridge, please reference http://www.nextarchitects.com/en/projects/lucky_knot?c=bridges.