Popularly known as the Beach Bridge, it was inaugurated on 1 May 1927 under the name of the Alfonso XIII Footbridge. This bridge that takes us to Alameda was built to go from the town to the beach of Arrigorri. At that time the port was located around the Old Bridge, so a swing bridge was built so that boats could go up the river.
The footbridge has two central half-spans that form a lowered arch with their respective lateral offsets. The 23-ton footbridge is made of steel, cast iron and wood. It is supported by two circular concrete piers covered with carved stone.
The turning mechanism consists of a circular rack on which a pinion moves and to which the driving force is applied. The opening and closing time of the gangway was two minutes for each manoeuvre.
The Ondarroa revolving footbridge is unique in Spain and one of the few of its type still preserved in Europe and the world.