Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

Jesus' footprints and the first catacombs in the world.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Artfully arranged bones of 5,800 Austrians.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A church of bones, decorated with 40,000 human skeletons.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

A muddy alien landscape that is home to rare species of exotic plants.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

A quiet marker in memory of local men and women lost in WWI.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

An outback test site for the Aum Shinrikyo doomsday cult.