This 135-year-old weather station studied the effects of the climate on human health.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

Where the lovelorn find a home for their sentimental keepsakes.

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

This statue is the only female representation of Rome's "talking statues."

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A forgotten "city of water" underneath the famous Trevi district.

Architectural monsters are devouring this palace's every door and window.

Inside this building is another country within Rome, a sovereign entity without a physical territory.

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

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

This abandoned Brutalist treehouse is a hidden architectural relic.

The only natural cave bath in all of Europe.

Outside of Budapest, a reconstruction of a 16th-century fortress.

Everything from miniature biblical scenes to life-sized statues are almond-based at this sweet and nutty gallery.

The true meaning behind this sculpture remains unknown.

Dine on Hungarian-Jewish dishes at this multigenerational, family-run institution.

Time stands still at this serene burial ground in the center of Budapest.

A scene from one of Hungary's most famous novels.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Once the home of a hermetic monk, this cave now houses a small church.