This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

An abandoned aircraft sits submerged in a lake in the Alaska wilderness.

A trading post in the North Pole where children send letters.

The king of U.S. high points towers over every other peak on the continent.

A historic freight system that found the true gold rush is in tourism.

Rustic natural hot springs in the deciduous rain forest.

Nine Gardens in one—with tea service.

Various forms of phallic art decorate this hill in commemoration of legendary local tragedy.

One man and his wife have turned a barren Korean island into a fantastical botanical wonderland.

This pair of small sea rocks has been "wed" using rope and ancient Shinto tradition.

An exquisite tunnel of cascading flowers.

A biblically accurate ark located beneath a Hong Kong bridge is fun for the whole Christian family.

A hidden architectural treasure in New York's Brooklyn.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

A strange tribute to all the fallen souls of war.

South Korea's only sex-themed park.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

A self-taught Siberian craftsman creates a fantastical and personal design for his 19th century village house.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

A remote forest of stone pillars along the Lena river.

Some of the world's only freshwater seals live in one very special lake in Russia.