Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

Medicinal spa created with the discharge from a geothermal energy plant.

An ancient Egyptian temple in the middle of Madrid, Spain.

Commonly acknowledged as the only public monument to the Devil himself.

A medieval village holds a very modern hotel.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This black church sits alone among a field of lava rock.

One kilometer of thick brass rod laid out before your eyes.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

The former hotel where Tesla invented the radio.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's national museum of scientific and industrial instruments.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Visit the monolithic tomb of America's most famous general.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Three columns of volcanic rock shoot out of the ocean.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.