Countless grotesque faces stare out from this eerie Prague art wall.

This artificial cave looks like something out of a fairytale.

The first museum in the world devoted to sexual gadgetry.

A Jenga-style cylindrical tower of books that appears to go on forever.

The largest and best-preserved rotunda in Prague.

This medieval manor house was equipped with secret compartments for hiding priests.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

Astonishing rock formations dot the Brimham Moor landscape.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A strange Georgian folly sits atop a lonely hill.

The rusted creatures wait to be discovered in Prague's botanical garden.

The last working windmill in the U.K. that has eight sails.

The longest stone bridge in England has an impressive history that dates back over 700 years.

This stone throne invites adventurers to observe breathtaking views of the Peak District.

A face-like natural rock formation so well known, a pub was named in its honor.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

This haunting stone chasm is a hotbed of mossy rock and English legend.

Great Britain's only hat-making museum.

Remembering the 72 passengers who lost their lives in 1967 airplane wreck.

A mysterious demonic figure peers down from its perch within the gorgeous Chester Cathedral.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The western face was supposedly left clock-less to snub the Welsh.

80 years of the Battle of Peasholm on a small English lake.