At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

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.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

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

When ecosystems collide in the arid Southwest.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

Two creeks flow out of either end of this canyon in opposite directions.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

The fifth-longest natural arch in the world, and the longest outside China.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Museum preserving torture methods from the past.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A colorful street named for the legendary Australian rock band.

A clear example of the process of erosion in action.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

This extraordinary geological oddity resembles human-made pavement.