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World's Largest Wooden Structure

  • Editor OGN Daily
  • Apr 29
  • 1 min read

The Grand Ring takes the form of a massive circular loop with a walkway on top and has a circumference of approximately 2 km (1.2 miles).


Exterior wooden wall of the Grand Ring at Expo 2025
Credit: Expo 2025

It was created for the Osaka 2025 Expo event that's currently underway in Japan, and was constructed using both modern techniques and Nuki joints, which is a traditional Japanese method that's used to connect wood without using nails or screws. It has been officially certified as the world's largest wooden structure by the Guinness World Records and has a width of 30 m (98 ft), plus an outer edge diameter of roughly 675 m (2,214 ft).


Designed by Sou Fujimoto Architects, it encircles the Expo site and is topped by a walkway called the Sky Walk at a height of 12 m (40 ft). This is lined with a large amount of flowers and allows people to stroll on top and take in views of the many pavilions and of the surrounding area.


Aerial view of the Grand Ring at Expo 2025
Credit: Expo 2025

The Grand Ring was originally designed for easy dismantling once the event comes to an end on 13 October, however Japanese authorities are considering keeping it in place and, to this end, are soliciting ideas from locals on what it could be used for going forward.


After all, the Eiffel Tower was originally intended as a temporary structure made for an expo, so why not the Grand Ring?


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