The ghostly remains of an accidental sea.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Oldest building in California still in use.

Megachurch turned Catholic church comprised of 10,000 glass panes.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The unbelievably opulent home built for an infamous newspaperman.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

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

This Costa Rican chapel is the most metal church in the world, literally.

It took 82 years and four different plaques to finally get the story right.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A crumbling hospital from the 1850s on Roosevelt Island.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

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

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

An homage to everyone's favorite prehistoric cartoon family.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.