Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

A terrific purveyor of natural history objects and curios.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This elaborate towering structure was once famed for its revolutionary height.

Brooklyn's Barkaloo Cemetery is the resting place of a scant two bodies.

The notorious headquarters of a corrupt political machine.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

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

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Plot your trip through the city on the sidewalk.

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

New York City's smallest piece of private property.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

Series of storm drains connected to a dark urban legend.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.