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

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

An all-female order shares an ancient culinary art with visitors at their mountaintop monastery.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This replica of the Greek structure is in the heart of Nashville.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

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

The sumptuous ceiling was one of the last things Charles I saw before his execution.

Beer lover's can-covered house.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Secret North Korean passage discovered below the world's most dangerous border.