The celebrated eyesore created by starry-eyed sweethearts.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

An eccentric inventor's castle home with its own indoor weather system.

At 207 feet, one of the world's longest continuous escalators.

The site of the climactic scene from the classic horror film is now a historic landmark.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Outsider art meets paleontology at this roadside reptile repository.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

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

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

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

A 18th century graveyard and its astonishing cortege of macabre iconography.

These fantastically named natural pools look like something out of a Scottish myth.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Largest lake in Great Britain measured by surface area.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.