This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

Marvel at this immense work of art that greets arrivals to the city.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

A statue honoring the tragic heroine of a Spanish literary masterpiece.

A street where pouring cider is an art form.

Two large posteriors in one giant statue.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

This 40-meter waterfall of light graces one of the most iconic stations in the Madrid metro network.

This small exhibition displays equipment and artifacts once belonging to the feared Stasi secret police.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

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.

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.

This 8-foot Anglo-Saxon cross is a rare surviving example of Mercian craftsmanship.

One of the U.K's earliest public water supplies is within the "plague village."

These once housed the families who decided in 1665 to quarantine themselves to save their neighbours.

These crude contraptions were used to aid in the mining of lead, silver and gold.

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