Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

A pair of connected skyscrapers form this symbolic gateway.

The world's tallest boat lift stands as a massive piece of industrial tourism.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

3,000 market stands in five former Zeppelin hangars.

The Guardian of Tallinn.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

An underground city of salt.

The tallest hotel in Europe.

Gargantuan home of Russian science.

World's largest bell sits on the grounds of the Kremlin in Moscow.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The ancient tomb acts as a calendar that keeps perfect time.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.

The other side is actually green.

Vast stretch of tide-pools with a unique Moroccan charm.

A fortified city, home to a remaining population of five families

Morocco's Argania trees are infested with nut-hungry goats.