A well-preserved quarry and six of eight continuous burning pot kilns used to make burnt lime and crushed stone are highlights of the self-guided walking tour in Fountain Rock Park.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

A glimpse into Taiwan's coal-mining past.

This hike brings visitors closer to Taipei 101, once the world’s tallest building, than any other trail.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

A stunning landscape of bunkers that once stored chemical weapons.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

Site of a tragedy on the Oregon Trail.

The skeletal white beams stand as a monument to religious dissent.

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

A piece of outsider public art accompanied by a strange urban legend.

The large vessel is known as world’s only full-scale replica of a Confederate ironclad.

From a 1930s bathing beach to a 1970s dumping ground, this stretch of Buenos Aires is now its largest and wildest reserve.

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

Narrow slot canyons in a badland eroded into soft sedimentary rock provide an otherworldly landscape in this remote Nevada state park.

The longest living non-clonal organisms on Earth.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

A whimsical, punny collection of "fence art" outside the tiny mountain town of Baker, Nevada.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

This beautiful fountain was sculpted by a female artist who was ahead of her time.