The hollow trunk of this 650-year-old tree was used as a hideout by two Jewish brothers during World War II.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

You may recognize this beautiful grove within Kaitoke Regional Park as location of the house of Elrond.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

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

This 16th-century house tells the city's history through old artifacts and quirky tales.

Even after the church tried to wipe the practice out, this pagan festival lives on each year in a small Scottish village.

This Scottish burial tomb once held hundreds of ancient eagle bones.

Geodesic dome luxury retreat in the Scottish Highlands.

Enter the world under the hill at this ancient UK burial chamber.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

This enchanting hill is home to fairy lore and a sinister local mystery.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.