This hidden art nouveau gem was designed by an architect in search of a national style.

Regency-era excess on the English Coast.

Famously misunderstood wonder of the ancient world

Decrepit Victorian public lift is a white-knuckle ride.

Artists and musicians now rule over this former rail station.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Catacombs turned marketplace.

One part local history, 99 parts gruesome haunted house.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Designed by Gustave Eiffel before his famed tower.

This imposing modern citadel started out as a home renovation project.

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

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

This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

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

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

Week-long block party becomes a competition for the best decorated street.

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