A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

The two abandoned overpasses are among the largest bridges in Poland.

The secret medieval communication system will whisk your words above the noise of the crowd.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

This restored colonial house was once home to the botanist responsible for bringing avocados to the U.S.

The crumbling remains of a once-grand building.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

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

A turquoise lake within a volcanic crater.

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.

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

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

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

The rusty hull of this 1899 ship serves as a tribute to explorers of the bottom of the world.

A sculpture of a giant hand reaches for the stars in the middle of the Atacama desert.

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

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

The reconstruction of this prominent building fulfilled a long-written command.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.