An abandoned cancer ward in New York City was the location used for Nadja's Transylvania castle.
Dr. Van Helsing:
Some women understand extremes. They understand how to push things to extremes. Life and death. The moon, tide, eternal flow... women understand that kind of stuff. It's in their blood. Once a month, their bodies let them know that... nature's one ...
In the opening dialog between Nadja and the man at the bar, Nadja is initially wearing a scarf over her hair. At one point the camera cuts to the man's face and we see the back of Nadja's head, but now suddenly and inexplicably, the scarf has disappeared and remains absent for the rest of the scene.
$23,846 27 August 1995