Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

An old wool-washing house filled with Fluxus contemporary art.

The ruins of a 16th-century bridge loom over Olivença's sovereignty.

This star-shaped military outpost is now simply trying to protect itself from neglect.

You can cross from one country to another in a single hop on this little bridge.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

One of only two commuter aerial tramways in the United States.

Read a book next to a Midtown waterfall.

Elevated freight railway turned wildly successful urban park.

Oldest existing wire suspension bridge in the United States.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

Six peaceful acres in a residential neighborhood dedicated to art and peace.

A world-class collection of mechanical musical instruments and automata.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

An ideal wedding spot that is almost too ideal.