Card is untitled on the front.
Printed on the back of this postcard:
WINCHESTER MYSTERY HOUSE
SAN JOSE, CALIFORNIA
SARAH L. WINCHESTER - architectural and artistic genius…or…misguided spiritualist? Both aspects are demonstrated in these mysterious and rambling roof lines.
B5068 Guided Tours Daily
Publication information: The Continental Card. The Winchester House. A Registered California Historical Landmark No. 868. Mike Roberts, Berkeley 94710.
The wikipedia page for the Winchester House contains a brief explanation of the weirdness that went/goes on there.