Where thousands of slaves passed through the "Door of No Return."

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

The most biologically diverse protected area in Africa is also the most dangerous.

Ancient Egyptian relief, claimed to depict an electrical light.

The largest known Ancient Egyptian obelisk.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Ozymandias’ time-keeping temple.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.

This 12-inch-tall wooden sculpture of a winged Virgin Mary has inspired much devotion and countless replicas.

Ecuador’s historic seat of government has been quietly looted in recent decades, and no one knows how or by whom.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

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

Constructed on the ruins of a convent, this tower saved countless lives.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

A bright little alley in La Boca is a part of tango history.

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

Looking for a crappy restaurant? Pull up a porcelain bowl and enjoy your meal.

Memorial to the father of the Republic of China.

Enormous pendulum helps keep Taiwan's tallest building from swaying.