The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Walk through the history of American pop culture.

Home of the only civilian casualty at the Battle of Gettysburg.

A small museum along the Susquehanna River is home to a rich collection of Native American artifacts.

The first of Lancaster's "rural cemeteries."

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A grove of colossal man-made flowers built to collect the sun's rays.

This failed condo development was reborn as a street art hub.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

An ancient Chinese temple where even the emperor dressed like a farmer in the name of the harvest.

This ancient Chinese observatory still contains early astronomy technology.

The most famous location in China was home to whole dynasties worth of imperial rulers.

The oldest teak bridge in the world is made from the remains of a royal palace.

This golden temple is surrounded by hundreds of stone tablets that comprise the "world's largest book."

A grand example of 19th century Burmese teak architecture, and the most significant of Mandalay's historic buildings.

A shrine built to combat the bad karma of a commercial venture.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

Where an entire elephant skeleton, a snakeskin table runner, and thousands of animal remains become art.