Engineering

This Maine bridge may be the last wire-supported bridge of its type in the world.

The mountaintop wind turbine boasts a viewing deck — and a fair share of controversy.

Built in 1911, the Tees Transporter Bridge is one of only six transporter bridges still in operation.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This historic cliffside mansion uses a natural cave for air conditioning.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Boats must transform into railroad cars to navigate this Polish canal.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This dangerous-looking suspension bridge may have been too unstable to remain open.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.