The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Impressive mining ruins overlook a spectacular view of Ireland's Copper Coast.

Public access to clean drinking water was an instant hit among the masses.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

Georgia's first brewery is also one of its oldest surviving buildings.

Carved faces add a touch of magic to this island's impressive oak trees.

A unique museum dedicated to the Gullah-Geechee people, housed within an old oyster cannery.

Dubbed the "smallest church in America," this tiny sanctuary was a local grocer's dream come true.

This mundane post marks the old location of the city's main postal hub.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

A psychological self-portrait in the form of a giant, segmented head.

Unconventional site where the tracks of Zurich tramcars intersect.

The great Danube river starts here.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This unusual lava tube spouts seawater during high surf.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Powerline dead since the 1980s despite appearances.