Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

A beautifully eclectic mix of architectural styles.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

One of Ireland's most infamous prisons for rebels including men, women and children.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

The castle still holds traces of the abandoned Roman fort it was built atop.

Commemorating the spot where the famous scientist fed his pigeons.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

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

Just like in Hollywood, Madrid has also a forgotten walk of fame.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

This lucky bronze frog was gifted to Madrid by a casino.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

An ongoing medieval tradition of communal pig husbandry is honored with a handsome granite sculpture.

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

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

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

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