Construction

A neighborhood of houses made of poured cement through a process invented by Thomas Edison.

Grand architectural relics gain a new life in this Pennsylvania warehouse.

Nicknamed the 'Chestergate Hotel,' the underground tunnel had beds, lights, and even flushing toilets.

This colossal underground passage paved the way for large-scale drainage and access tunnels across the U.S., but it almost wasn’t built.

After local authorities changed the design, the building's architect, Le Corbusier, wanted nothing to do with it.

One of the country's largest diving schools set in a picturesque nature reserve.

Cathedral-like Victorian vaults are hidden within this iconic bridge.

This mile marker stands at the unofficial end of a highway built to defend the United States from a Japanese invasion during World War II.

In a historic steel foundry east of the Mississippi River, thousands of wooden crates hold the architectural remnants of buildings long gone but not forgotten.

The last of nine massive kilns that produced many of the red bricks for buildings in Washington, D.C. and northern Virginia in the early 20th century.