Yo, Adrian!

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

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

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A display of magnificent stained glass windows is the first exhibit of its kind.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

The only road through the heart of Glacier National Park.

A walk through the historic city center, under the streets of Seattle.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Experience a charming 1930's version of "infotainment."

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

The remnants of a creative early method of wildfire prevention.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

St. Augustine's record-setting narrow street was designed to protect against pirates.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A little piece of Paris in the sultry south of the U.S.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.