One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

The birthplace of America's favorite fruit-flavored mystery dessert.

Called the “General Motors of the piano industry,” these buildings once produced as many as 700 pianos a week.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

This collection honors the iconic, and proudly American lighter that just won't quit.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This historic Victorian hotel has a scandalous history of affairs and murder.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

On the waterfront of Sydney, Nova Scotia, a 60-ft. fiddle greets incoming ships.

This tiny abode has been covered in the art of the little old lady who made her life and living there.

The sign at the garden gate reads: "These Plants Can Kill."

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

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

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

A stunning Victorian abbey and walled garden on a lakefront.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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