A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

This pun was simply waiting to come to life, and one defense contractor made it so.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Outsider art meets paleontology at this roadside reptile repository.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Built by the patriotic residents of Boonsboro in a single day.

The aggressively banal name of this underground fortress of bureaucracy does little to evoke its truly surreal existence.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This dramatic rail curve was once the target of a failed Nazi attack.

Steepest flood safety railway in the entire world.

Memorializing an American tragedy of massive proportions.