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

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

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

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

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

The rubbery beast is sculpted from recycled materials.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This living legend of maritime history is enjoying a second life.

Skyscraper powered by wind turbines attached between its towers.

Whitewashed mosque contains the world's largest carpet.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

A gigantic collection of teeny, tiny books.

A unique museum dedicated to culture and artistry of carpet weaving.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

Light still pours into the ruins of this ancient Islamic observatory.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

The Avenue of Mausolea is a series of grand palatial tombs.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

A symbol of hope, survival, and national character, especially after it rose phoenix like from the flames.

Once upon a time in Kamakura, a five-headed dragon fell in love with an Indian water goddess.

These statues are dedicated to the damned souls of those executed centuries ago on the beautiful Yuigahama beach.