One of the highest Roman forts in Britain is set amid dramatic scenery on a notoriously difficult road.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

A steep and winding road in the Yorkshire Dales passes by these deep natural potholes.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

A dramatic sculpture high up in Yorkshire with vistas on an industrial scale.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

One of the most exquisite Lycian hilltop citadels in Turkey.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

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

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

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

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

These spooky and unusual stone formations create an underworldly landscape.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.