This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Did Inca children also slide down these smooth rocky slopes above Cusco?

Death rituals and sacrifice inside a Peruvian megalith.

This stone complex marks the urban center of a lost civilization.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

Monsters and miniatures are held in equal esteem at this wondrous museum.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Fast food feels like fine dining at this award-winning modern Georgian building.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

The first skyscraper to include a Ferris wheel built into the facade.

The world's largest piece of copyrighted artwork.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

This spectacular mosque houses the second-largest chandelier in the world.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

This bazaar is one of the oldest in the Arabian world.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

An entertainment center in a huge transparent tent.

A sober museum housed in the original administrative building of one of Stalin's largest gulags.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.