Ancient burial grounds of the wealthy.

Stone carvings record the Norse myth of Sigurd, providing a glimpse into Scandinavia's transition from paganism to Christianity.

It houses the remains of a 17th-century version of the Titanic.

Sweden's "good old days" painstakingly re-created in a model village.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Stockholm's deepest subway station is also a stunning ecological wonder.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

A study of Fascist era Art Deco design in Italy.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

Every inch of this chapel is covered in craftsmanship from across the world.

This amazingly preserved Doric temple was abandoned before it was ever completed.

Italian cave with exceptional acoustics and an unsavory history.

Thousands of well-dressed mummies below a monastery.

An abandoned Byzantine fortress and notorious prison.

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

Large collection from the 3rd millennium BCE.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.