A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

A huge teapot illuminates a home for the elderly.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

A statue of the second-tallest Dutchman in history.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

Where royalty waits in the height of luxury.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

This monumental mural crafted nearly 40 years ago is still in perfect condition.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

This impressive former palace contains a hidden gem for fans of modern sculpture.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

This enormous censer uses a pulley system installed over 400 years ago.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

A historic Christian shrine nestled within a spectacular natural cave.

A curious collection of locks and keys.

This Ottoman-era church is hidden amid a busy tourist area.

The ruined doorway is a portal to the building's turbulent and torturous past.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.