Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

Caves famous for the dragon-slaying saint who lived there.

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

The second-highest train station in Europe.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

A historic observatory precariously perched at the "Top of Europe."

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

An Austrian house of bones filled with hundreds of intricately painted skulls.

A small but immensely extravagant palace built by the "Night King."

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

This abandoned Belgian fortress is purposefully being left to nature.

Stockholm's narrowest alley is barely over two feet wide.

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.

A domino effect created with Britain’s iconic telephone boxes.

An architectural oddity hides in plain sight on this iconic London bridge.

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

These morbid carvings remind churchgoers of the inevitability of death.

This London plaque marks the spot where David Bowie's famous alien made his debut.

An artistic tribute to the famous singer, just around the corner from where he was born.