The most loyal of little dogs, or a Victorian era publicity stunt?

360° views of the city plus five floors of optical illusions and hands-on science.

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

A 200-year-old collection of oddities and medical paraphernalia.

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

Largest lake in Great Britain measured by surface area.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

Museum dedicated to the terror regimes of Hungary.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

An ancient Egyptian temple in the middle of Madrid, Spain.

The world's most elegant power lines.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

The mark of the Devil's horns on a marble column in Milan.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

100 year tradition of fist fights, marked by marble footsteps.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Go inside to really appreciate this 500-year-old technological masterpiece.

A 19th-century artistocrat's mansion, turned into a library, hidden in a modern library.

Once the home of a hermetic monk, this cave now houses a small church.