Europe's official "zero-level," the equator of elevation.

A line number in Amsterdam that will likely never be used again due to its tragic history.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

A stunning architectural yet functional feat, towering over Oslo.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Home to three historic ships from the age of Vikings.

Sweden's "good old days" painstakingly re-created in a model village.

It houses the remains of a 17th-century version of the Titanic.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Granting the right of way to ships over surface traffic since 1917.

A walk through the historic city center, under the streets of Seattle.

This working class sculpture pounds his hammer all the livelong day.