A museum dedicated to one of Portugal's most celebrated writers.

Where sweethearts leave their love locks in the Uruguayan capital.

The oldest café in Montevideo preserves its history as the city's bohemian hub.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

The narrowest house in Buenos Aires is less than 10 feet wide.

A symbol of Texas pride.

This downtown Dallas art installation is always on the lookout.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

A museum dedicated to secret surveillance.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Europe's official "zero-level," the equator of elevation.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A Serbian church lit by chandeliers made of weapons.