300 Kim Ma Street
Located on one of Hanoi's busiest thoroughfares, 300 Kim Ma Street is a sprawling, abandoned diplomatic compound originally constructed for the Bulgarian Embassy in the late 1980s. Never officially occupied due to geopolitical shifts and diplomatic delays, the fortress-like structure stood decaying for decades, accumulating chilling urban legends of disembodied voices, phantom guards, and spectral apparitions that made it Vietnam's most famous haunted house.