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

Mini version of the massive Isabella head

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

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

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

A comprehensive look at the art of Joaquín Sorolla in his former home in Madrid.

This open-air sculpture museum is located under a bridge in the center of Madrid.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

This lucky bronze frog was gifted to Madrid by a casino.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

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

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

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.

These distorting, funhouse mirrors achieved fame in a renowned piece of Spanish theater.

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

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

An automaton perched above an classic clock and watch store

This sculpture is a reminder of the old lamplighters of Madrid, a profession that is now extinct

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

This small museum tucked within a subway station holds pieces from Madrid's past.

Inaugurated three times, this tower offers some of the best views of Madrid.

Shrapnel scars and bullet holes from the Spanish Civil War can still be seen in this monument to Spanish doctor Federico Rubio.