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Cover of Invisible frontier

a novel ·

Invisible frontier

by

An adventure guide to New York City's hidden secrets explores a vast urban wilderness that includes subway tunnels, the sewer system, abandoned aqueducts and buildings, the heights of its bridges, and other unusual landmarks.

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  • ● adventure, biography & memoir

the long version

An adventure guide to New York City's hidden secrets explores a vast urban wilderness that includes subway tunnels, the sewer system, abandoned aqueducts and buildings, the heights of its bridges, and other unusual landmarks.

M

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"An adventure guide to New York City's hidden secrets explores a vast urban wilderness that includes subway tunnels, the sewer system, abandoned aqueducts and buildings, the heights of its bridges, …"

— Margaret

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