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

Rippling sand dunes frozen in the Arizona rock.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

This historic national park is covered in the stunning ruins of red rock pueblos.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Despite its name, this route in southern Utah offers a heavenly day trip.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

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

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Read a book next to a Midtown waterfall.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

An enormous, inside-out glass globe built in 1935.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Most-visited and most-photographed slot canyon in the American Southwest.

Tucked in the back of this amazing antique store is an important piece of medical history.