This is the world's longest bridge. It links the Chinese cities Qingdao with Huangdao, could easily traverse the English Channel, and at 26.4 miles long extends far enough that you could run a marathon on it. With room to spare.

The Qingdao Haiwan Bridge took four years, 10,000 workers, and more than $8 billion to construct, numbers that sound big at first but are actually shockingly low given the scale of the project. The previous record-holder, Louisiana's Lake Pontchartrain Causeway, is all of three miles shorter.

When it opens later this year, Qingdao Haiwan will welcome up to 30,000 cars per day across its six lanes. None of which, hopefully, break down in the middle. Because that's a loooooong walk back to shore. [Telegraph]