Engineering

The ruins stand as a somber reminder of France’s worst civil catastrophe of the 20th century.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

It would take you approximately an hour and a half to walk to the end of Mexico's largest pier.

The longest structure of its kind ever built in Michigan.

The remnants of this unusual bridge await an uncertain fate.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

The remains of a centuries-old water system that inspired local legends of secret tunnels.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

This structure was moved nearly 40 feet while people continued working inside it.

At the time of its completion, it was the tallest dam in the world.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

The location of Puerto Rico's first water bottling plant, thanks to a collaboration between Mother Nature and technology.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

These engineering masterpieces are a dominant feature of the Belfast skyline.

A section of a historic wooden trestle viaduct is preserved next to the railway line it once carried.

This unique abacus hanging in the Technical University of Munich actually tells the time.