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.

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

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Two plaques commemorate the site of Shakespeare's first theatre.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Pop culture has helped to keep this iconic British building from being destroyed.

A network of concealed passageways lies within a busy London Underground station.