The astonishing collection of an infamous criminologist.

Baked in 1898 and still almost flawless, this floral masterpiece is considered the world's oldest complete wedding cake.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Started as a kitchen garden, now the second largest botanical garden in the world.

A surrealist labyrinth and museum of contemporary sculptures.

An Italian hillside ghost town.

Though an earthquake destroyed this village in 1980, one former resident still walks its streets every day.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

An industrial relic is now one of Europe's most staggering art spaces.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

This historic little railroad runs through some of the most beautiful scenery in Germany.

A historic steam train meanders along one of the most scenic rail routes in Germany's Black Forest.

This outsider art house has gone from clinical creation to astounding artwork.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

For decades, vendors have sold clothes once worn by American soldiers who stormed Italy in the 1940s.

Centuries of warfare, tragedy, executions, and poetry come together in this 13th-century fortress.

The old church, buried by the 1784 Mount Vesuvius eruption, is a remarkably well-preserved place where people now pray for the souls of the dead.

"World machine" built by an untrained Austrian farmer.

Ride a dragon train into a world of dwarves.

The highest cold-water geyser in the world.

A burial vault located under Tiber Island in the middle of the Italian capital.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.