A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

In which a local geological marvel becomes a quaint roadside attraction.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

New York City's only radical feminist independent bookstore.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

The notorious headquarters of a corrupt political machine.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

This little museum is built on a theater that was once a wildly elaborate speakeasy.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A semi-scholarly approach to sex.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

Dr Barnes' $25 billion private collection of art and arboretum.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

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

35,000 grape hyacinths flow like water down a garden hill.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

A centuries-old church stands as a testament to Boston's "father of architecture."

This historic patch of real estate offers a glimpse of colonial Boston.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.