A true treehouse near Hawai'i Volcanoes National Park.

This blowhole is supposedly caused by a trapped monster.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Resonating tubes make music from highway overpass.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Three acres of mythology-inspired sculptures are visible from the highway.

One man's swirling six-acre monument of stone.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

A once grand hotel is being retaken by the wilderness it once capitalized on.

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

A neo-Gothic castle in the Argentinian countryside.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.