The largest mosque in Cambodia was built to unite the country's Muslim community but soon sparked division and controversy instead.

A gruesome memorial for those lost in this area during the Khmer Rouge genocide.

Khmer Rouge's high security prison.

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A battle between nature and architecture in the Cambodian jungle.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A beautifully eclectic mix of architectural styles.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A floating cat sanctuary on an Amsterdam canal.

Museum preserving torture methods from the past.

The house that took a plunge into the facade of a museum.

This splendid tomb may look fantastic, but there's nothing in it...

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

Baroque celebration of the end of the Great Plague of Vienna.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Op-art architecture designed for happiness.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

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

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The stunning interior of this Gothic church is covered in ornate gold details.