This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

This Parisian gem is one of the most incredible ethnographic museums in the world.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A haunting collection of the vanished and disappearing natural world.

This massive library holds what was once the largest book collection in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

Dim sum, served in a grand old theater.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Painstakingly built dioramas sit unnoticed in a Boston office building.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Take a step inside the picturesque studio of America’s most renowned sculptor.

Journey through vintage Americana inside this small Massachusetts shop.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

A beautiful but toxic fountain of mercury.

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

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

The sole remaining outpost of a once-thriving South Carolina chain still sells “pic-a-nic” baskets.