These barriers stand as stark reminders of Northern Ireland's troubled past.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

The little-known second castle that William the Conqueror built in York.

This unique creation was used to house and wash sheep prior to shearing.

This small Roman arch was transformed into a dwelling by the founder of the Trinitarian Order.

From a distance it looks like a real castle, but up close everything is slightly too small.

The longest and steepest staircase locks in the United Kingdom.

This iconic building was founded as a school for the impoverished, but became one for the sons of the local gentry.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

Once the longest swing bridge in Europe.

This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

The once-a-day siren is a reminder of the days before time was standardized.

The Real LegoLand.

This 19th-century monument served an important purpose for fishermen thanks to its built-in barometer.

A replica of one of the most complete mammoth skeletons discovered in England.

This Iron Age hill fort remained hidden until a series of storms revealed its history.

The oldest working Brewery in Britain.

A 13th-century fortified manor house that was once sieged during the English Civil War.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

This imaginative sculpture is a memorial to this town's former mining industry.

A well preserved remnant of the English Civil War.

This natural "sea of stones" was once used by the Romans as a quarry.

This park and coal mine heritage site is home to two of the last steam winding engines in the UK.

Constructed 20 years ago, this sculpture is slowly fading to the hands of time.