A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Elevated freight railway turned wildly successful urban park.

A stellar example of Art & Crafts architecture, and a movie set to boot.

This elaborate towering structure was once famed for its revolutionary height.

Huge masonic hall in Philadelphia with lavishly themed rooms.

World's first "penitentiary," meant to be humane, drove men insane.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Towering basalt columns, a creation of fire and ice.

The echoes of a railroad town that solemnly mark the end of the line.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

The king of U.S. high points towers over every other peak on the continent.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

Home to items never before seen by the public.