A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

When ecosystems collide in the arid Southwest.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

This restored eighth-century palace is a shining example of ancient Umayyad architecture.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The "dragon babies" of southeastern Europe.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A miniature train-ride through Slovenia's largest cave system.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.