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

This impressive scene portrays the elusive forest giraffe of Central Africa.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

This poignant display is now a memorial to these regionally extinct species.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

At the top of a local ski mountain is a hidden cemetery containing the graves of just two soldiers.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.

This museum in the woods evokes the work and lives of Michigan's 19-century lumberjacks.

The failure of one component toppled this entire bridge during rush hour.

An iconic 1960s theater with a Buckminster Fuller-style geodesic dome.

This tribute to a local man towers within a quaint lakeside park.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

The eroded core of an ancient volcano is now accessible by a short hike.

Beach instrument turned bed and breakfast.

A former mining hospital is now a vibrant artistic hub.

These ancient sacred grounds granted amnesty to those who managed to reach them.

This quirky Arkansas wax museum does not shy away from the macabre and the grotesque.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

To find the "unicorns of the deep" you've got to go downstairs.

The headquarters of a pioneering cast iron and cast aluminum cookware company is in ruins, but still standing.

A humble plaque marks the site where the country music legend was found dead in his Cadillac.

A comprehensive collection of bonsai set in a beautiful campus.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.