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

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Regency-era excess on the English Coast.

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

Legends surround this jagged rock formation in the New Mexico desert.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Phil Mortillaro uses keys to bring art back to the Village.

A bit of retro transportation flair preserved in the world's largest department store.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

This abandoned horse racing track was an exercise in hubris from its inception.

A replica of the flagpole that gave a frontier town its name.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

A stone pillar commemorates the surrender of the extraordinary Apache leader.