Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A weathered, American Foursquare-style house originally built for lumber merchant William Wimsatt.

At the birthplace of American railroading, a world-class collection of historic trains.

A hidden alley in urban Baltimore is a haven for graffiti artists.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

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

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

America's first federal monument.

This rudder is one of the few remnants of a shipyard that once operated on the banks of the Potomac River.

Dedicated to a U.S. Army lieutenant colonel who was also a bird watcher and artist.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

The world's largest rotating world.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A recreated sign from the movie Jumanji has become a makeshift tribute to the film's late star.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

The filming location of a shark attack in Steven Spielberg’s famous shark movie.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

Destructive children, start your engines.

World War II bunker still standing on the New Jersey beach.

The first national memorial to honor all women suffragists stands on land where suffragists were once imprisoned.

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.