Florida keys Bridge AKA the seven mile bridge it was built in 1912 the seven mile bridge has went under construction more than once after taking damage from hurricanes.
Golden Gate bridge built in 1937 the golden gate bridge connects San Francisco to the oupper half of San Francisco.
niagara Falls bridge AKA the rainbow bridge due to its location next to niagara falls. Built january 27 1938 It connects the cities of Niagara Falls, New York, United States, and Niagara Falls, Ontario, Canada
Tunnels
Queens Mid town Tunnel built on november 15 1940 this tunnel crosses under the east river and connects queens to long island.
Lincoln Tunnel Built in december of 1934 This tunnel was built for traffic and connects NY to NJ
Dark Gate Built in 1824 in hungary. Is an artificial tunnel Built below a cathederal