Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

An homage to everyone's favorite prehistoric cartoon family.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

See massive fossils that are over 200 million years old in northeastern Arizona.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A self-built castle made by a mysterious man.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

This modernist bridge highlights the bear as a symbol of Madrid.

This little sun pays homage to a massive gate that once stood at this location.

Shrapnel scars and bullet holes from the Spanish Civil War can still be seen in this monument to Spanish doctor Federico Rubio.

A plaque in Madrid’s West Park marks the launch of a queer icon’s unlikely media career.

This grand gate once marked the entrance to a military barracks.

This historic fountain is a favorite neighborhood meeting point.

Built to celebrate the glory of a new queen, this forgotten monument has moved around Madrid three times, reflecting 200 years of political whims and city redevelopment.

Known as the Casa de las Siete Chimeneas, this haunted 16th-century manor has a dark, mysterious past.

The oldest building in Madrid.

The remains of a convent turned military barrack in the heart of Madrid.

Once a resting spot for King Fernando VII.