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.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

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

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A building so large that it has its own weather.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

"Where the ducks walk on fish."

The 25th President's marble casket can be visited in this classical Ohio tomb.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

This dramatic rail curve was once the target of a failed Nazi attack.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

This giant, rotating globe was built to celebrate the expansion of a company that makes steam cleaners and pressure washers.

Could it have picked a better place to land?

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.