Built in 1937 for a family's summer getaways, this cabin originally had just one bedroom, one bathroom and 960 square feet to its name. The current homeowners loved the rustic ambience but wanted an open space that would take full advantage of the creek and forest views. The couple hired architect Amy Alper to construct a new, modern addition that would capture the existing home's historic feel.This is a vacation home for a San Francisco couple.Calistoga, California1,275 square feet; 3 bedrooms, 2 bathrooms