A statue honoring 44 continuous years of greeting passing ships.

"X" marks the spot of an echo chamber in the middle of a plaza.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

An early 20th-century bullring converted into a modern shopping center.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

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

The world's oldest bookshop still in operation.

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

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Hundreds of Buddhas in a re-discovered Indonesian temple.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The commemorative stone column conceals a secret laboratory.

An architectural oddity hides in plain sight on this iconic London bridge.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.