Skyscraper powered by wind turbines attached between its towers.

Ancient and modern architecture are joined in Louis Kahn's monument to democracy.

Quite possibly the last cross all humans will ever see.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

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

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

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

Morocco's Argania trees are infested with nut-hungry goats.

Morocco's largest Jewish cemetery.

Over 4,700 miles of trees being planted to hold back the desert.

The world's largest ship graveyard is the product of decades of corruption.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

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

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

Death road of Bolivia.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

This elephant kraal is the only one remaining in Thailand, dating back to the 16th century when these massive mammals were integral players in war and trade.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

Eat a meal surrounded by bomb fragments.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

Abandoned limestone cave was once a sacred place of worship.

A sacred lake with thousands of sacred carp and a biblical history.