Sniff the Titan Arum's rotting flesh.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

One of only two commuter aerial tramways in the United States.

A crumbling hospital from the 1850s on Roosevelt Island.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

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

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

These fantastically named natural pools look like something out of a Scottish myth.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The most accurate timepiece in the world.

The site of the climactic scene from the classic horror film is now a historic landmark.

Home to items never before seen by the public.