In 1832, a New York merchant built a house with a hidden 2-foot-wide passage; researchers now link it to the Underground Railroad

For decades, visitors to Manhattan's Merchant's House Museum walked past a built-in chest of drawers without knowing the full significance of the narrow passage concealed behind it. After two years of research, historians concluded that the passage was likely used as a hiding place for people escaping slavery.

Raccontata datimesofindia.indiatimes.com