So he started Spelunk NYC, a company that gives legal tours of lesser-known places across the city.

BBC: Abandoned New York City

But despite its proximity to the beach, it goes mostly unnoticed, said Geoff Grandberg, who runs the urban adventure tour company Spelunk NYC.

BBC: Abandoned New York City

You hunt down the requisite ghosts and demons, investigate the aristocratic politicking of the main town and spelunk down into any number of scary holes.

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