Now a pedestrian bridge, this was once part of a narrow-gauge railroad that ran along the east coast of Kauai.

This monument built by Japanese American immigrants spent decades underground.

This blowhole is supposedly caused by a trapped monster.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

A burial ground for workers at one of Hawai'i's largest sugarcane producers that laid buried for decades.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

This elaborate towering structure was once famed for its revolutionary height.

The world’s first penitentiary, meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A work of art that pays homage to a Victorian timepiece in Providence.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

The headquarters of the famous Yale society.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

The oldest still-operating tavern in the United States was once owned by a pirate.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

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

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

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

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.