The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

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.

The mummified relics of an American missionary.

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

The highest point on the island known for buildings that touch the sky.

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

Final resting place of Typhoid Mary.

Self-sufficient greenhouse floating on the Hudson River.

Little Red Lighthouse under the George Washington Bridge.

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

Legendary private island in the Bronx...devoid of rats.

A Manhattan Episcopal church with an eerie underground crypt.

The loneliest island in New York.

From scholastic to sepulchral - now under reconstruction.

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

A whimsical monument deep in this park commemorates the groups that helped build it.

Harlem park dedicated to compulsive hoarders killed by their own junk.

Read a book next to a Midtown waterfall.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.