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

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

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

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This magnificent Cincinnati graveyard is also a popular public park.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Seattle’s Whimsical Mural Master.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

A community gathering place that once housed half-ton tanks and the World's Fair.

A colorful architectural gem in Seattle's uniquely modern Central Library.

A museum dedicated to the history and exploration of both popular music and science fiction.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.