Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

In the Monastery of São Vicente resides a gallery devoted to a breathtaking collection of seashells.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

A collection of objects supposedly singed by the hands of souls in purgatory.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

The world's oldest known salt mine.

During World War II, Austria's oldest salt mine was used to store thousands of pieces of stolen artwork.

The mystery of the Putim Ossuary involves a tricorn hat.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

This cliff-face port is considered a masterpiece of mining engineering.

A former mining village that now operates as an open-air museum.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

This poignant tribute to the White Rose movement showcases artifacts related to the heroic anti-Nazi struggle.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

A hidden gem in the middle of the city's infamous Jewelry Quarter.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

An abandoned brutalist monument whose history has been lost to the ages.

A forgotten and crumbling Yugoslav monument to the victims of fascism.