Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

A self-built castle made by a mysterious man.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

The history of this Moorish castle includes royals, a Mexican-Spanish association, and several attempts at lodging.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

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

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

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

The fragmented remains of a massive public bath connected to the city's water supply.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

To fit bodies into this Renaissance crypt, they were first left to decompose in the crypt's rotting room.

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

Mysterious Spanish catacombs of unknown origins.

An ode to the famous Las Vegas signage.

A model solar system adds a celestial touch to this suburban park.

An open-air sculpture museum in a park in Alcorcón.

Guitarist Paco de Lucía overlooks travelers as they pass through this train station dedicated to his legacy.

Many miles south of Loch Ness, a similarly-named sea monster stands at the center of a roundabout.

A thorough look at the development and history of the underground's rolling stock of the Madrid subway system.

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

The morbid items in this small and hidden museum are not for the weak stomached.