This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

The largest library in Latin America owes its existence to an Old World earthquake and a Napoleonic invasion.

Ella Fitzgerald, opera singer Enrico Caruso, and dancer Isadora Duncan all performed in this lavish, supposedly haunted theater.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

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.

One of the oldest colonial buildings still standing in South America.

Pivotal home of Nobel Prize winner Pablo Neruda.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This church is named for one of the most dramatic tales in the early Christian church.

A fountain standing as a testament to a doomed alliance.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

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

This famous city eluded concrete detection until the early 2000's.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The largest caravanserai in Cyprus also includes amazing examples of Ottoman architecture.

This no man's land slicing through the island is strewn with abandoned relics of another time.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

The best-preserved ancient theater in the world.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Amid the rubble of Aleppo's Old Quarter, part of a historic market has been restored and re-opened.