A mysterious tunnel hidden in the shadows of a colorful, historic sanctuary.

Baroque celebration of the end of the Great Plague of Vienna.

This small Australian town is considered home to the "Yowie" or the Aussie Big Foot.

A colorful sculpture of an Australian symbol patrols an otherwise ordinary traffic island.

A nearly lost tribute to an 11-year-old boy killed during a World War I homecoming parade.

Deadly scalding and one of the largest hot springs in the world.

The once and future home of New Zealand's famed Pink and White Terraces.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

The celebrated eyesore created by starry-eyed sweethearts.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Enormous burial mounds of ancient emperors.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

This bell stars in a tragic love tale and is said to make wishes come true.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Real bones which are said to have belonged to a Polish dragon.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A son-and-daughter meat market, hawked by mom and dad.

The once highest point in China blends symbolic design with a kick of adrenaline.

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

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.