Shelves covered in dozens of coffee bean varieties fill this North End institution.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

Where commuters walk through remnants of an ancient Greek necropolis.

Large collection from the 3rd millennium BCE.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

This curious, round temple is the oldest still-standing marble building in Rome.

A huge enchanting public park just outside the ancient walls of Rome.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Architectureal fantasy quarter of Rome.

One of the deepest indoor swimming pools in the world.

Lavish royal estate punctuated with heated greenhouses.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

The world's only museum devoted to the wonders of fluorescence.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

Unconventional site where the tracks of Zurich tramcars intersect.