Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

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

A very classy 1920s-era bar right in Grand Central Station.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Read a book next to a Midtown waterfall.

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

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

The history of radiation is on safe display at the foot of a radiation science laboratory.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

An old World War II hangar holds 20 vintage aircraft and the rare opportunity to take a ride in a 1940s warbird.

The world's last remaining store of its kind.

A stunning landscape of bunkers that once stored chemical weapons.

An institution that preserves the history of institutionalization.