One man's homage to the orange as realized through a long-term folk art labor of love.

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

A health museum containing a 27’’½-foot intestine.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

Fantastic collection celebrating the final send-off.

A Prada store in the West Texas desert that is never open for business.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

360° views of the city plus five floors of optical illusions and hands-on science.

A 30-acre garden inspired by the principles of modern physics.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This once lawless patch of land was home to an infamous and deadly land feud.

The 19th-century ruins hide deep in an overgrown forest.

The only international border marker within the United States.

A 19th century family buried their dead among the pines, beneath gravestones styled after ancient Scottish cairns.