This statue is the only female representation of Rome's "talking statues."

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

The best place in the world to buy tinned fish.

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

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

Large miniature theme park with 100-plus models.

This museum was invented in a novel before being made real by the author.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

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

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

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

This building has survived for more than a century and remains virtually untouched.

A forgotten graveyard lost in the tangles of an overgrown garden.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

The solemn exterior conceals an opulent interior of this 17th century church.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.