The two massive guns that defended Cartagena Bay.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

The United States Capitol's former columns still stand.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

A little piece of Paris in the sultry south of the U.S.

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

Introducing the Green Fairy to her fawning masses.

A private museum dedicated to preserving the heritage of Mardi Gras' most beloved underdog parades, open by appointment.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The curiosities and wonders of pharmacy in a delightful historic building.

This foolish Victorian sea fort was converted to a deluxe hotel.

The broken skateboards that became a poignant memorial to a murdered skater.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

The grave of Mary Nasson is shrouded by witchy legends.

The most photographed house in Maine looks good enough to eat.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Neither bomb blasts nor heartbeats escape the giant ears of this super sci-fi Arctic outpost.

An acoustic anomaly with a mysterious cause.