One of the world's oldest olive trees, thought to be over 2,000 years old.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

The fairy tale castle of the "fairy-tale king."

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Swiss vineyards in a UNESCO heritage site.

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

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

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

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

The only known mosaic depicting the Greek god of sleep, Hypnos.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Legend has it fairies gathered at the site of this medieval castle.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ethereal glowing blue ocean cave in Croatia.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

A miniature train-ride through Slovenia's largest cave system.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

At an estimated 3,800 years old, this olive tree is one of the oldest on earth.