This collection of ancient, mountaintop, underground tombs was once hidden by decades of bloodshed.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

The colonial city's social history is reflected in its fanciful door knockers.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

A mouldering Colombian bull ring stands as a reminder of the country's complicated relationship with a brutal sport.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

A tropical paradise once home to space exploration and military installations.

In Bermuda, this formal naval residence has become a go-to for cliff-jumpers and hikers.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

This historic electric train has operated with regularity since the early 1900s.

A contemporary art installation housed within a Gothic cathedral.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

With a facade that measures just 107 centimeters, this five-story building is one of the skinniest in Europe.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

Spain's largest bullring offers a unique glimpse at architecture and history.

The final resting place of the great navigator, or maybe his brother.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

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

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.