The world-record holder for the longest bridge stretching continuously over water.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

One of the oldest, tallest, and most haunted lighthouses in America.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

A unique home built by Andrew Jackson Caldwell that also served as a military hospital.

Home of an evil witch famous within southern folklore.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.