The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A small cemetery chapel designed by Frank Lloyd Wright and built in 1906.

See where Bill Murray kidnapped a hapless Punxsutawney Phil.

The famous winding walk at Chartres is surrounded in mystery and myth.

Home to over 300 antique cars and motorcycles, including Thomas Edison's Model A.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

This small-town opera house has appeared much more in national culture and history than its charming setting might suggest.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

World's second largest particle accelerator, where nature reveals its secrets.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

All of Chicago's wood-paved streets are long gone but two alleys remain.

Internationally known record store and purveyor of "dusties."

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

A notorious Route 66 eatery once frequented by Al Capone.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

One of the finest examples of a black soil prairie that was barely saved by the Great Depression.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.