While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The "lovely red Vega" of the legendary record-settling pilot.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Washington's iconic carousel has a nice piece of Civil Rights history.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This elegant structure at the heart of a Finger Lakes town was originally a drinking fountain.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

Two thirds of this Montreal neon icon has survived to flash another day.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

An artist weaves "wooden quilts" with scraps salvaged from his Katrina-damaged home in Tremé.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

A pink cottage covered in hearts served as a haven and a resting place for LGBTQ activists.

A touching tribute to the "Wonkey Donkey."

This inexpensive lodging house was once a prison notorious for its inhumane practices.

The Painted Ladies of Ontario aren’t your average beach homes.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.