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

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

An unexpected desert oasis in South America.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

The world's oldest known salt mine.

The Habsburgs' royal collections of art and wonders.

An Austrian house of bones filled with hundreds of intricately painted skulls.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The beautiful baroque library of the Hapsburg empire.

Model Trains and Much More in Hamburg.

Hamburgers are intensely proud of their tunnel beneath the river.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The only quarter of the Old City not dedicated to a major world religion.

The home of the Dead Sea Scrolls is an abstract modernist dream.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

An unusual snaking bank of boulders caused by longshore drift.