Odaiba is a series of artificial islands created in the mid-19th century for positioning cannons to protect Tokyo Bay. The area was later converted into a seaport. In 1993, the Rainbow Bridge was constructed to connect the islands with the mainland as part of a major redevelopment project. The suspension bridge has a span of 2,618 feet. Its moniker comes from its nightly display of red, white and green lights powered by solar energy.
