Infrastructure

Gustave Eiffel's masterpiece until the Eiffel Tower was built.

The experimental rail system which gave birth to both Toby the Tram Engine and a new system in the UK for authorisation of rural railways.

An abandoned WWII-era U.S. Army megaproject, turned hiking trail in the remote Canadian subarctic.

A Victorian-era British railway viaduct has been transformed into an elevated garden.

This 19th century wooden span is one of only four retractile bridges in the United States.

The tallest dam in Montana and top 10 in the country.

Two sections of the old dam that made it possible to tame the Meuse in Belgium in the 19th century.

This is the last surviving Bollman truss bridge in the world.

This striking high elevated road snakes downhill between densely packed buildings.

The site of the the first evidence of oil occurrence in Australia.

A small but elegant example of early highway engineering in the American Southwest.

This dam is part of the nation’s largest public power producer and a historic steward of Hiwassee River.

Across Valencia lie the remains of three ancient fortifications built centuries apart: a Roman enclosure, an Islamic expansion, and a medieval Christian wall.

An obscure roundabout modeled on the Death Star from “Star Wars.”

The only place in the world where the general public can walk aboard an authentic offshore drilling rig.

A heritage-listed, cast-iron tower that was used for stripping out components of raw coal gas.

A Grade 2 cast-iron aqueduct, designed by Thomas Telford which links 2 halves of an enormous embankment.

This elevated footbridge has become a focal point for planespotting in Mexico City.