Two groundbreaking brothers from Pasadena.

Sports history, made in the Arroyo Seco.

One of Hollywood’s favorite government buildings.

Colorado Boulevard’s historic bookstore, operating since the bustling city of Pasadena was merely some orange groves and a few ostrich farms.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

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

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

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

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

This unique building in the main square stands out among the city's typically Baroque architecture.

This private residence was the template for one of the most beloved television homes of all time.