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

The highest bridge in America was built for an almost unnervingly small amount of money.

The largest self-built castle in the U.S., six decades in the making.

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

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

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

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

One of the oldest art supply stores in the United States.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

This historical art colony is adorned with thousands of hand-carved concrete sculptures in the Mayan Revival style.

Frida Kahlo's childhood home, now a museum of her life and works.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

Jean Tinguely's bizarre monster sculpture is hidden deep in a forest.

A sculpture serving as an homage to Pope John Paul II.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

A building so large that it has its own weather.

Town of spiritualists and mediums in Florida.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

A vast array of tropical plants collected by a vacationing couple.

Electrical pylon in the shape of Disney's beloved mouse.

A Circus legend leaves an unexpected endowment.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.