A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

This bridge was constructed from the rubble of the infamous Bastille.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The ruins of a monastery where Saint Bridget of Sweden had her revelations recorded.

This serene wooded hilltop has a dark history as the climactic point of the Swedish witch trials.

Legend says this fabled well held part of a mythical Norse tree.

A massive land art sculpture fills a green space once tarnished by a landfill.

Known locally as the Jungfrutornet, this Medieval tower hides a dark legend.

Sweden's southernmost prehistoric rock art is hidden just outside Gothenburg.

Gravity seems to fail at this intriguing Swedish attraction.

A Bronze Age stone ship said to be the grave of the mythical founder of Gotland.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

Ancient stone graves shaped like ships provided a Viking-like burial to carry the dead to the afterlife.

This castle ruin in the middle of nowhere is a gem for wildlife enthusiasts.

This fantastic cave remained unexplored until 1948 when three schoolboys discovered a hidden entrance.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

A nightly tradition fills the streets of Flogsta with a collective scream.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

This luxury hotel suite is located deep in the bowels of an old mine.

Iron Age grave stones and Viking burials, a short drive from Gothenburg.