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

A park where people have been going to feed friendly pigeons since the 18th century

This tiny home was originally a narrow alleyway.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This Indianapolis landmark offers a secret panoramic view of the city. 

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The only pub in the world surrounded by an ancient stone circle.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

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

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

Dramatic river bend surrounds a natural red-rocked pedestal.

A tunnel with windows, so you don't miss out on the impressive views.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

More than 100 years after his death, the world's largest steer is still attracting crowds.