This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

Where Mary Shelley’s 'Frankenstein' and John William Polidori's 'The Vampyre' were born.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

Video games, body language, and postal history are all on display in this Swiss museum.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

A huge cathedral single-handedly constructed by one eccentric monk.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The world's oldest surviving music hall was also once a freakshow.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

A unique art installation located on what was once considered the widest railway bridge in the world.

This colorful mosaic remembers one of Britain's most deadly peacetime fires.

An encyclopedic collection of mammal penises.

The world's largest sundial can cast a shadow more than 1,600 feet long.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A stately palace has been converted into the world's largest cannabis museum.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

A herd of half-sized cow sculptures has stood in this part for nearly 50 years.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Peek through a transparent pyramid and drink in the mountain made of books.

An interactive museum dedicated to preserving and sharing the history of the home computer.

Home to items never before seen by the public.

Following years of secrecy, the hidden history of a World War II site is being brought to light.

Britain’s longest ancient monument, this great 8th century earthwork was built to mark the boundary between what would become England and Wales.