Venice's island of the dead.

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Monument to a suicide protesting the Soviet invasion.

A church of bones, decorated with 40,000 human skeletons.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Cold war icon and onetime "hole" in the iron curtain.

This unattributed sculpture in Amsterdam is hiding in plain sight.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

Aqua white sand highlighted with fiery red rocks.

A massive metal lobster welcomes tourists to a roadside restaurant.

An incredible garden taking over the interior of a massive sinkhole.

A clear example of the process of erosion in action.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

One of the first big sculptures anywhere in Australia.

Three-story concrete ram with a permanent gift shop.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

A special train service transported Sydney's dead from this station to "Necropolis Receiving Houses" at Rookwood Cemetery.

One of the best beaches in the entire world.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

One of the world's steepest streets seems to have houses sliding down it.