Genesis of modern hydroelectric power.

Toxic waste disaster that founded the Superfund program.

A forsaken wonder in the middle of the East Side neighborhood.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

Soaring over the Niagara Whirlpool since 1916.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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

An inconspicuous footbridge beloved by San Diego locals.

A hotel and restaurant serving as the mecca of kitsch.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

These ancient sacred grounds granted amnesty to those who managed to reach them.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

This black shoreline is made up of exploded lava particles.

Watch the newest land on the planet form before your eyes.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

This legendary urban waterfall creates a dazzling display of rainbows.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.