A Manhattan Episcopal church with an eerie underground crypt.

A natural gas leak provides a flickering flame beneath a waterfall.

At this cozy bar tucked down a hidden Galway backroad, Guinness makes the Gaelic come out.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

The largest public collection of roses in the United States.

Welsh literary history is preserved in the delicate pages of these medieval manuscripts.

More gold than anywhere else, ever.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Once the last route taken by condemned prisoners.

The beams of the New College, Oxford dining hall come with an amazing story.

This carved stone slab marked the grave of a local dragon slayer, who makes a killer pie.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

This restaurant's specialty is "a major enigma for food historians."

Grapes be damned, this distillery makes wine from apples, blueberries, cranberries, and more.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

The first woman in America to receive a medical degree.

A bizarre house filled with an astounding array of collections.