Though much of the castle was robbed of its stones, the underlying earthworks are among the best-preserved in England.

This lonely metal cross may hint at the true location of a medieval showdown between Christian and Pagan kingdoms.

The English town of Mansfield likely got its name from this enigmatic breast-shaped mound rising abruptly from the earth.

English parliaments were once convened by this ancient oak tree in the heart of Sherwood Forest.

This landmark Victorian folly rewards visitors with spectacular views over the Peak District.

Once the largest unsupported dome in the world, beating out the Pantheon and St Peters in Rome.

The tallest freestanding structure in the United Kingdom.

A seaside town with no sea in sight.

Legend says this little-known stone circle is formed from people petrified as punishment for dancing on the Sabbath.

This tower was constructed to commemorate the man who helped bring true democracy to the United Kingdom.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Graham Ibbesons's moving tribute to the victims of England's worst mining disaster.

Some of England's last cave dwellers lived and worked within this huge cave.

Seat of the Duke and Duchess of Devonshire for centuries.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

A poignant memorial to the 106 coal miners killed in three major accidents in Derbyshire.

Eyam took steps to quarantine themselves and keep the plague from spreading.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

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

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

The view from this giant Stone Age toad is unexpectedly beautiful.

The last surviving roundhouse in the United Kingdom also plays host to a popular annual beer and music festival.

A folly built to satisfy a gentleman's bet that he could drive his horses through the eye of a needle.