Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Beautiful steampunk ghosts of early Massachusetts.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

An enormous, inside-out glass globe built in 1935.

This small Irish village suffered the greatest loss of life when the Titanic sank.

Oliver Cromwell once seized the land under this house, which included the ruins of a medieval abbey that the owner used to build his stately home.

The modern birthplace of Irish freedom.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The world's tallest box hedge is found in a delightful garden.

Though they've since been renamed, these two streets hint at Dublin's darker days.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Experience what life was like in Ireland during the Viking and medieval ages.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

One of Ireland's most infamous prisons for rebels including men, women and children.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.