See massive fossils that are over 200 million years old in northeastern Arizona.

This sanguine boulevard was named after a deadly cowboy bar fight.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

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

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

Giant topiary dog once played a role in a terrorist bomb plot.

An ancient Egyptian temple in the middle of Madrid, Spain.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A curious collection dedicated to human and animal anatomy and pathology.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

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

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

The infamous Boston Mob ran rackets from an office here in the 1970s.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.