A fairytale-like grove with a crystal-clear spring bubbling under the shade of a massive ancient tree.

This colonial mining complex is now home to magnificent themed gardens.

In the quiet village of Fulmodestion, the ruins of a medieval church remain hidden among vines and foliage.

An abandoned town is hidden in Great Smoky Mountains National Park.

A beautiful, water-filled quarry that has become a popular haunt for swimmers and artists.

This region of Slovakia boasts some of the most plentiful opal mines in the world.

One of the few places where you can visit a cenote and Maya ruins at the same time.

These legendary stone steps were once used to haul coffins up the rockface.

It was meant to help transport wounded soldiers to a secret underground hospital.

An abandoned train station in Munich constructed for the 1972 Olympic games.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th-century.

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

This stone quarry was used to make axes and other tools more than 6,000 years ago.

Cascading outward, this waterfall creates the appearance of a flowing veil.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

A small waterfall tucked away in the forest of Harmby Gill.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

These ancient ruins were the final resting place of King Henry II's mistress.

The concrete skeletons of an abandoned Swedish town hide among the trees.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

This dreamy street will transport you to wintertime in Victorian England.