Orcas on display and in the water.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

This former coal gasification plant found a curious second life as a popular public park.

The highest point in Washington state is a volcano covered in glaciers.

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

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

When ecosystems collide in the arid Southwest.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

These aggressively sustainable art homes look like something out of 1970's science fiction.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The drama of nature in full effect in this Nevada State Park.

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

Step inside Lucy, the world's largest "elephant."

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.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This abandoned sea fort has become an accidental bird sanctuary.

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

Once America's tallest structure, now a Baltimore landmark.