The Rainbow Bridge at Niagara Falls

Niagara Falls

The Niagara Falls, located on the Niagara River draining Lake Erie into Lake Ontario, is the collective name for the Horseshoe Falls and the adjacent American Falls along with the comparatively small Bridal Veil Falls, which combined form the highest flow rate of any waterfalls in the world and has...

 is an international steel arch bridge

Arch bridge

An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side...

 across the Niagara River

Niagara River

The Niagara River flows north from Lake Erie to Lake Ontario. It forms part of the border between the Province of Ontario in Canada and New York State in the United States. There are differing theories as to the origin of the name of the river...

 gorge, and is a world-famous tourist site. It connects the cities of Niagara Falls

Niagara Falls, New York

Niagara Falls is a city in Niagara County, New York, United States. As of the 2010 census, the city had a total population of 50,193, down from the 55,593 recorded in the 2000 census. It is across the Niagara River from Niagara Falls, Ontario , both named after the famed Niagara Falls which they...

, New York

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 (to the east), and Niagara Falls

Niagara Falls, Ontario

Niagara Falls is a Canadian city on the Niagara River in the Golden Horseshoe region of Southern Ontario. The municipality was incorporated on June 12, 1903...

, Ontario

Ontario

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 (west).
The Rainbow Bridge was built near the site of the earlier Honeymoon Bridge, which had collapsed on January 27, 1938, due to an ice jam in the river.
A joint Canadian and American commission had already been considering a new bridge to replace it, and the collapse added urgency to the project.

A design by architect Richard (Su Min) Lee was chosen (and later used again for the Lewiston-Queenston Bridge

Lewiston-Queenston Bridge

The Lewiston–Queenston Bridge is an arch bridge that crosses the Niagara River gorge just south of the Niagara Escarpment. The bridge was officially opened on November 1, 1962. It is an international bridge between the United States and Canada. It connects Interstate 190 in the town of Lewiston,...

, approximately 10 kilometres (6 mi) downriver).