This ancient structure appears Roman, but was constructed during the 16th century and was utilized until 1911.

What once sat in the world’s spotlight is today a largely disused ghost complex.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

One of the most photographed locations in the entire city.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

The ruins of an ancient fortification wall sit in front of and underneath this boutique hotel.

A magical, if a bit tacky, 1960s castle conjures up medieval fairytales and Greek mythology.

Large collection from the 3rd millennium BCE.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Its columns were all carved from the same white oak tree.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

"The most colorful grottoes of the world.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

The patron saint of spinsters grasps a container of dried blood.

A wunderkammer of mysterious objects and stories.

Started as a kitchen garden, now the second largest botanical garden in the world.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

An abandoned Cambodian resort that mirrored the downfall of the country as it was happening.

A small 12th-century temple surrounded by waters believed to have curative properties.