A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

A modern English garden of eccentric beasts, follies, and oddities.

A small waterfall tucked away in the forest of Harmby Gill.

This remarkable building has a lot to offer, even if you're not placing a bid.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

Everyone's favorite clay duo immortalized in bronze.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A monument at Alicante Marina honors a little-known hero of the Spanish Civil War.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

A controversial art piece that harkens back to local folklore.

This influential Renaissance-era library was once the haunt of kings and monks.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

These ancient rock graves were featured on the cover of a Black Sabbath compilation album.

Once upon a time these giant concrete tanks were used by local fishermen to clean their wild-caught mussels.

Once the largest unsupported dome in the world, beating out the Pantheon and St Peters in Rome.