From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A beautifully eclectic mix of architectural styles.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

Tiny memorials honor individual victims of the Holocaust.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Japanese national treasure originally built in 593 CE.

Peace Park and the Atomic Bomb Dome.

Near the mouth of the Yodo River, this museum offers visitors six floors of hands-on learning about Osaka's raw sewage.

A shrine contains nearly 200 statues of the Buddhist deity Jizo, dressed in bibs by parents who have lost a child.

This 700-year-old street food market features baby octopus and soy donuts.

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

The 10,000 Torii shrine.

Once a black market electronics marketplace, now an otaku shopper's paradise.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.