The Akashi Kaikyo Bridge in Japan spans the Akashi Strait, connecting Osaka Bay and Harimanada. It has two large towers that support the bridge deck through suspension cables. Several challenges had to be overcome in constructing the bridge, such as strong currents, deep water, and preserving the fishing area. Foundations for the towers were constructed by excavating the seabed 60 meters below water and installing large concrete caissons. Suspension cables composed of steel wires are supported by the towers and anchored on both sides of the strait. The bridge includes damping devices in the towers to counteract vibrations from wind.