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

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

This castle was once the home of one of the most powerful women of the Renaissance.

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

These morbid carvings remind churchgoers of the inevitability of death.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.