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

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

The United States Capitol's former columns still stand.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Sniff the Titan Arum's rotting flesh.

Obscure Freemasons still live in D.C.’s largest private residence.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

One man's lifelong obsession with death.

This forgotten boat elevator was an engineering marvel in its heyday.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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