Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Museum dedicated to awful artwork.

A unique columnar residence built in the 19th century.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The site of Paul Revere's historic two lantern warning.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

A men’s restroom became a sandwich shop.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Solar powered Spectacle Island features all-green facilities.

A massive Montreal stadium that has seen nothing but trouble since its inception.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.