When flour explodes, it's not a pretty sight.

These giant metal horses graze on a hilltop near the Montana highway.

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

Tiny horses tethered to antique rings are scattered around the city.

An inspired museum dedicated to the patron saint of enslaved people, inside the cloisters where he lived and died.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

This translucent sculpture represents a quintessential component of New York City's skyline.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Remembering the Alamo with a full-scale replica of the 1836 city.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

When ecosystems collide in the arid Southwest.

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

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

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

What is the Thing?

Ancient pueblos built into the base of a natural canyon wall.

A spiritual vortex among the red rocks in Sedona.

A reproduction of earth's many biomes.

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