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

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

The collection includes seven one-of-a-kind automobiles, vintage fashion, and more.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

Yo, Adrian!

Mountain where Jesus was first tempted by the Devil.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

A unique set of caves that spits waves back out into the ocean.

An ode to one of the first concerts broadcast via satellite.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This tiny man looms large over downtown Charleston.

Thousands of tiny squares in different colors make up this piece of street art.

This elaborate towering structure was once famed for its revolutionary height.