This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

The plaques around this 19th-century structure recall some rather strange tales.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

This section of the Kennet and Avon Canal has been designated the same level of heritage protection as Stonehenge.

The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

A well-studied colony of endangered bats roosts in this abandoned Victorian Gothic mansion.

This fantastic museum honors Gloucester waterway heritage.

Abandoned boats decaying in the largest ship graveyard in mainland Britain.

A building so large that it has its own weather.

Single runway interrupted by a busy road that cuts across its middle.

Tiny castle in the middle of the Rhine made you pay to pass.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Legend says this sacred tree was a gift from goddess Athena.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

The metal frame is all that's left of a wicker sculpture which once towered over the M5 motorway.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

The unusual stilted beacon is the town's only active lighthouse.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

You can crawl inside this atmospheric 5,000-year-old tomb.

The oldest residential street in Europe also features an optical illusion.

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

The abandoned funicular tunnel was a secret base for the BBC during World War II.