This single room has survived the centuries with almost no deterioration.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

The ancient tomb acts as a calendar that keeps perfect time.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

In an effort to escape the horrors of slavery, one man mailed himself to freedom.

A curious friendship between two inanimate ladies.

A way to take your secrets to someone else's grave.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A mysterious statue of a leather jacket-clad rebel leans coolly on an odd yellow clock.

A semi-scholarly approach to sex.

A beautiful, historic location open to the public.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Mysterious 500-year-old tapestries depict a unicorn hunt.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

Despite a recent paint job, the factory still sits empty.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.