Engineering

Over 80 years old, this hand-dug tunnel is a Chinese-style portal to another world.

Constrained by time and topography, this civil engineering landmark was constructed 100 feet above Starrucca Creek over the course of a single year.

In a forgotten Central Valley industrial park lies the busiest railroad junction in California.

The vintage, artistic cage of the city’s first lift welcomes visitors to an old heritage building.

This distinctive bug-like bridge is made of recycled horseshoes.

This ancient causeway can flood daily, leaving Mersea Island as a true island for hours at a time, and cutting its 7,000 residents off from the mainland.

This pier made of ice and constructed over the Antarctic winter is used when the resupply cargo ships arrive in summer.

These milestones have survived centuries and still mark distances although incorrectly.

A wide array of locomotives call this outdoor museum home.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

Geothermal resources are cooled in this oddly-shaped structure before being used for irrigation

A short tunnel built straight through a magmatic dike.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

This freewheeling amusement ride is the last of its kind.

The first curved wooden bridge in Canada was built as part of the Alaska-Canada Highway.

A unique look into the bowels of a century-old funicular.

Can you see the face staring out at you from the buttress of this bridge?