Take a step into the workshop where Edison and his employees revolutionized the world.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

Memorializing an American tragedy of massive proportions.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

A smaller model of the Da Vinci sculpture that took 500 years to come to life.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

10,000 flowered plants bloom in the City of Roses.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

The site of Paul Revere's historic two lantern warning.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Memorial built in 1922 in remembrance of WWI casualties.

Its collection includes a broad array of social, geographic, graphic design, and political history.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Hear the quietest sound from across the dome.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.