Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

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

A Saxony castle houses one of the largest and most outstanding mineral collections in the world.

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

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Thousands of flowers create enchanting pink tunnels over the city streets.

Berlin's old airport.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

It took 82 years and four different plaques to finally get the story right.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The Uros people live on floating reed islands in lake Titicaca.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This red lake 4,000 meters above sea level is home to rare flamingos.

A black and white solution to the Bolivian city's traffic problems.

A valley of unique erosion patterns lends to a view like nothing on Earth.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Monument to a suicide protesting the Soviet invasion.

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

Macabre astrological automaton clock dating to the late 1400s.