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

Abandoned blast furnaces are an enduring reminder of Scranton's once booming iron business.

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

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

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

On the Oregon coast there is a natural hole that seems to be draining the sea.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A memorial to an ill-fated Holy Land mission once described by Mark Twain as “a complete fiasco.”

The largest wooden building in the world now houses a fascinating collection of aircraft.

A Roman-style column in Oregon hides a spiral staircase inside.

100-year-old shipwreck you can walk up to at low tide.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

This Great Depression-era creation was once known as the strangest house in the world.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

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

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

The third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.