NEW YORK — It wasn’t the rats. Or the smells. Or the germs. No, the most unpleasant part of descending into New York City's vast sewer system, acco...

A former urban explorer says the most unpleasant part of exploring New York City’s sewer system was the cockroaches, not the rats, smells or ever-present dangers.

NEW YORK — It wasn’t the rats. Or the smells. Or the germs. No, the most unpleasant part of descending into New York City's vast sewer system, acco...