This bike path was sunk below water level for maximum wonder.

The world's largest boar is a huge steel titan found at a French rest stop.

One of Europe's oldest yew trees has lived more than 2,000 years.

The surviving remnants of a destroyed medieval church now stand in a public park.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

A road that winds through this natural cave is the only way to access the small, appropriately-named village of Cuevas.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The tallest mountain in mainland Netherlands isn't actually very tall.

A naturally occurring amphitheater carved by erosion into the mountainside.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

A lush oasis full of vibrant plants and striking geometric displays.

This abandoned five-star hotel is now a five-star urban exploration destination.

These small, triangular, colorful houses are a staple of Madeira Island.

A neolithic tomb converted into a tiny chapel.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

This oddly shaped church resembles a rocket.

An abandoned mining complex in Serra do Gerês.

Houses are tucked between, on, and underneath giant boulders.

Some 4,000 individual tiles make up this striking blue billboard from the golden age of air travel.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A glacial valley filled with silver beech trees in the mountains of Portugal.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

Rainwater transformed this old quarry into a peaceful pond you won't find in most tourist books.