This 47-story "M" needed 20 years to be completed

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Single runway interrupted by a busy road that cuts across its middle.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

Join in a Seance at the Swedenborgian Church.

Elevated freight railway turned wildly successful urban park.