This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

The pieces in this sculpture garden are made from demolished buildings that were once landmarks of Motor City.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

Live long and prosper in Vulcan, Alberta.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

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

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

Trace the history of writing at this unusual North Carolina destination.

A man's home is his castle.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.