An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

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

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The attic of a four-century-old canal house hides a clandestine church.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

A beautifully eclectic mix of architectural styles.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

A mesmerizing wonderland of salt-encrusted tree branches and pencil roots.

Home of the infamous Rug Man of Doha.

A superb spot to appreciate the traditional boats of the Indian Ocean.

This remote British Imperial telegraph relay outpost drove men insane.

Groups of prehistoric tombs that dot the mountains of northern Oman.

Hydraulic systems in an ancient underground Iranian city.

This steamship has been beautifully rusting off the coast of an Iranian island since the 1960s.

The oldest surviving mosque in the UAE has mysterious origins and unusual architecture.

The United Arab Emirates's biggest and oldest fort pays homage to a lost era.

One of the largest sand dunes in the world is nicknamed the "Scary Mountain" due to its steep slope and sharp incline.