Dozens of houses in the Adirondack Mountains are reminders of a literal "cottage industry" to cure people of a deadly disease.

The former home of a disgraced local priest now hosts a mysterious secret supper club.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

This mouldering abandoned mental hospital was once a center for progressive healing.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The place where Dvořák composed some of his most famous works.

Behind a grungy bodega facade, a Poblano family serves rich, home-cooked meals.

A prized globe signed by Amelia Earhart and Charles Lindbergh sits in the Brooklyn office of the American Geographical Society.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

A semi-scholarly approach to sex.

The modest home of the very immodest dancer who cost a king his crown.

A breathtaking 19th-century trail overlooks Lake Tahoe.

An unassuming island in the middle of the Hudson that hosts campers, including Aleister Crowley.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

A historical home in upstate New York honors the work of John W. Jones, a formerly enslaved man who was a major agent for the Underground Railroad.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

Local legend says the remains of Father Christmas lie within the medieval grounds.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

One of the largest fleets of armored vehicles in the world, sitting out in the California desert.

An ancient fortification lives on in this Chinese city.

This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

Art Deco stylings conceal the true nature of this bridge.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.