This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Roman ruins top white travertine terraces formed by ancient hot springs.

Ancient serpentine sacrifice holder that has stood the test of time.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

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

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.

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

A seemingly endless landscape of pure salt stretches far across Bolivia.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.