Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

A giant portrait of an ancient king looms over the river.

No one knows who built this strange cave of worship or exactly why.

The romantic botanic tunnel feels like a well-kept secret.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Moss and stone turn this waterfall into an otherworldly liquid veil.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

A cluster of granite granaries perched on stilts.

This charming candle shop has been in business since 1789.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

A small Portuguese cottage formed between boulders in the countryside.

Picturesque intersection of witchcraft and ancient Christianity.

The stunning interior of this Gothic church is covered in ornate gold details.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

Museum dedicated to "the man who moved the Earth."

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Walk 2,300 feet above the ground on the "Troll's Tongue."

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This striking structure is the Socialist-modernist centerpiece of a former Soviet spa resort.

Sculpture garden of religious statues made it through Soviet rule.

Lithuania's outdoor sculpture trail of wooden folk art.