A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A bright little alley in La Boca is a part of tango history.

A gateway to a mysterious network of underground tunnels.

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

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

The site of a devastating modern-day mud volcano eruption that buried parts of a village.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

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

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Thousands of costumed dolls fill one of the world's creepiest museums.

Bangkok's men with dangerous jobs come here in search of protective talismans.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

A rare chance to ride one of the few continuous elevators still in operation.

Started as a kitchen garden, now the second largest botanical garden in the world.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

This elegant arc of a waterfall marks a religious turning point.

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

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant