There was a top secret plan during World War II to seal a group of soldiers inside the rock.

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

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

The "Little Ones," show Portugal in full miniature splendor.

One of the largest Roman settlements in Portugal.

The corpse bride of Portugal.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This South London cemetery holds the remains of more than 15,000 people.

Giant, friendly pelicans in Central London, the most unlikely of places.

A hands-off space for graffiti artists to hone and display their skills.

An artistic tribute to the famous singer, just around the corner from where he was born.