This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

The site of a legendary battle immortalized in medieval literature.

A moody and picturesque riverside ruin overgrown with vegetation.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Sometimes called the Banksy of Madrid, Muelle was a pioneer of street art in the Spanish city.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

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

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

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

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

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Commonly acknowledged as the only public monument to the Devil himself.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A mysterious stone embedded at the base of a historic Boston building.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

The crumbling remains of a 19th century fortess.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

A steampunk wonderland that preserves America's history of industrial innovation.