The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

A super-sized promotional trick that is now a D.C. landmark.

Sculptures, jams, and the wild west collide at this folksy retreat.

Carved, egg-shaped stone with no explanation.

This simple apartment may have inspired some of the most important theories in the history of science.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

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

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

Glacial erratic or man-made dolmen? It probably wasn't druids.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

A historic house devoted to the teachings of a 1700's prophetess and her mysterious box of revelations.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

These giant metal horses graze on a hilltop near the Montana highway.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

This 13th century castle is chock full of ghosts and impossibly rare cows.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

Series of underground houses inhabited continuously for centuries.

This little museum has an exhibit devoted to the elusive forest denizens.

A beautiful final resting place with some surprising residents.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

Twisted buildings adorn the banks of the Rhine river.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.