Apparently, the whole cosmos emanates from this plain concrete tower.

It's easy to see why this eclectic architectural wonder has been dubbed the "Spaceship House."

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This legendary urban waterfall creates a dazzling display of rainbows.

Volcanically heated hot springs.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

One of the few remaining monuments dedicated to South Boston's Irish heritage.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

The oldest continuously inhabited street in America.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

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

A futuristic-looking beach house built for the owner of a snack food brand.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

A gorgeous gem on the ocean.

Once a popular hangout spot this huge mall was left to ruin after economic crash.