Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

Giant, friendly pelicans in Central London, the most unlikely of places.

The second smallest castle keep in England.

A group of glacial erratic boulders are improbably balanced on white limestone pedestals.

The remains of the concrete ship can be seen during low tide.

The largest timber structure in Europe.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

A stone obelisk towering over the surrounding countrysides beckons hikers across the rolling moors.

The longest cutting on the M62 contains some surprises—though it's best to leave the motorway to appreciate them.

France's most famous cemetery, with some of its most curious tombs.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

This petite cutlery factory sits on the foundations of a defunct gasworks.

The only museum with its curator—and her pets—buried inside.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Museum dedicated to the terror regimes of Hungary.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This stunning concert hall has become a symbol of Iceland's national recovery.

Medicinal spa created with the discharge from a geothermal energy plant.

The world's northernmost aquarium looks like it has fallen over.

The world's most charming instant portrait studio also happens to be its smallest.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.