Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Collect holy water from a Bronx grotto.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

This historic railway museum may have lost its passengers but not its love for trains.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

Glacial erratic or man-made dolmen? It probably wasn't druids.

Connecticut sites linked to the only trial to ever use demonic possession as a criminal defense.