The "Seinfeld" diner.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over 50 whirling pools left behind from the glacial age.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Founded by the famed children's book artist, this museum spreads an appreciation of the arts through picture books.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

The trials and tribulations of marking Poe’s grave.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The little-known final resting place of one of America's greatest writers.

A nearly 100-year-old dining car in upstate New York embodies the golden age of roadside dining.

An abandoned dollhouse factory.

One man's swirling six-acre monument of stone.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Fittingly, America's museum of architecture is itself a magnificently designed old building.