Looking for an extraordinary experience in Japan? How about climbing to the top of the world's longest suspension bridge for a panoramic view of the city, or a walking tour on an expressway yet to be completed?

So-called infrastructure tourism is an emerging segment of the wider tourism market that has drawn interest from both sightseers and travel organizers alike — especially as the number of construction projects increases ahead of the 2020 Tokyo Olympics.

Akashi Kaikyo Bridge, the world's longest suspension bridge, which links the port city of Kobe and Awaji Island, is a popular destination for such tourism. Participants get a spectacular view from the top of a 300-meter-high pylon.