King Carlos IV laid the first stone during construction of this chapel.

This phone booth was recreated to honor "La cabina," considered the best horror film in the history of Spanish television.

A thorough look at the development and history of the underground's rolling stock of the Madrid subway system.

This 40-meter waterfall of light graces one of the most iconic stations in the Madrid metro network.

Known as the Casa de las Siete Chimeneas, this haunted 16th-century manor has a dark, mysterious past.

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

A “floating horse” hangs menacingly over the heads of passersby.

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.

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

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

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

A small but stubborn relic of Spain’s turbulent past hides in plain sight.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

An old, deep well, connected with a miraculous, divine rescue and the patron saint of Madrid.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

You can climb to the top of the column built to honor the "father of British inland navigation."

The house where Charles Darwin's grandfather formed many of his influential ideas and inventions.

A small village in two different countries.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This modest marker near Notre Dame identifies the very center of Paris.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This bridge was constructed from the rubble of the infamous Bastille.