One of the oldest surviving Swedish-American homes in the United States.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Virgil's many-mouthed gateway to the underworld.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Steaming blood-red hot spring from hell.

A deadly ancient portal to the underworld.

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

The world's most active stratovolcano is almost always erupting.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

Ancient Greek oracle of the dead.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

Crossing a suspension bridge above a forest is the only way to reach this 12th-century monastery.

This large, circular tomb is the final resting place of the first emperor of Rome.

This mushroom-shaped rock has frustrated and fascinated locals for centuries.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

A stone in Wolin, Poland, marks the possible location of a legendary Viking fortress.

An open-air museum of 18th-century homes and churches transported from various villages in Southern Poland.

This 13th century Gothic brick castle is the largest in the world by surface area.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

The coffin-shaped church was once home to monks who slept in coffins.

One of the world's largest collections of medieval religious art.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.