A blunder resulted in these charming stone-lined streams becoming the target of a Nazi bombing.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

This historic black and white monastery is one of Bulgaria's architectural jewels.

An homage to the medieval rulers of Bulgaria.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

Step inside this medieval Orthodox gem and travel back to the 16th century.

This fifth-century church is one of the oldest Christian sites in the Balkans.

A crumbling monument to a now locally-extinct sport in Bulgaria's oldest ski resort.

UNESCO-protected ancient burial ground.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

An abandoned saucer-shaped monument in the Bulgarian mountains.

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

A historic Georgian building and warm springs.

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

Semi-precious Blue John stones have been mined in this cavern system for centuries.

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

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.

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.

Seat of the Duke and Duchess of Devonshire for centuries.

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

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

A seaside town with no sea in sight.