This lucky bronze frog was gifted to Madrid by a casino.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Giant topiary dog once played a role in a terrorist bomb plot.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

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.

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

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

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.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

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

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Despite its name, this route in southern Utah offers a heavenly day trip.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."