When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

The world's largest piece of copyrighted artwork.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

What happens here stays here – unless it affects the whole world.

This tiny home was originally a narrow alleyway.

On a clear day, you can see all the way to the Virgin Islands from the top of this observation tower built in the 1960s.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

A dilapidated dock tells the story of Titanic's missed arrival.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

A forest wonderland caused by Burlington, Vermont's aggressive southwestern winds.

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

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

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

This legendary urban waterfall creates a dazzling display of rainbows.

Race through the maze, get your name on the sign.