The highest tropical mountain range in the world is in Central Peru, home to a vast array of exotic and quirky plants and animals.

This remote Himalayan temple is in danger of being completely washed away by a melting glacier.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

The highest rapid transit station in the world.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

During the American Revolution, this mansion hosted failed peace talks between the British and Americans.

Snack on a partially gestated duck egg.

Two New York rooftops are home to the largest rooftop soil farms in the world.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

This mysterious marker puzzles pedestrians and infuriates geographers.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

The Andean town where every single building is decorated with a brightly colored frieze.

Monks in the empyreal Alazani River valley have preserved their 1,000-year-old winemaking tradition.

This historic street in Quito is known for its seven stone crosses—and one presidential assassination.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.

Years of neglect and nature took a toll on this 19th-century lighthouse.

Holding the most bodies of any cemetery in the United States.