A haven for book enthusiasts across the street from Retiro Park.

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

This piece of early engineering is rather unknown despite its location in the heart of Madrid.

This little sun pays homage to a massive gate that once stood at this location.

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

This girder was hit by a bomb during the Spanish Civil War, but nobody knew about it until 2016.

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

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

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

Kingly French toast comes soaked in milk or red wine, then drizzled in a citrus-perfumed syrup.

Automatons that were once removed after one fell from the building.

This sculpture pays homage to the street sweepers of Madrid since its inauguration in 2001 in Plaza Jacinto Benavente.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

Look up from the busy streets to discover how time is kept!

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

A sculpture serving as an homage to Pope John Paul II.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.