This incredible house, sited on a 1.6-acre hilltop lot in Monterey Park, was designed by architect Pierre Koenig, who's most famous for his Case Study Houses Nos. 21 (aka the Bailey House) and 22 (aka the iconic Stahl House). His Iwata House was built in 1963 for a Dr. and Mrs. Iwata and never once changed hands over the years. The house is spread out over nearly 5,000 square feet and was originally built with six bedrooms that were later converted to four larger rooms; "Can be put back easily," assures the listing. The immense kitchen, like the rest of the interior, has been remodeled, and now includes two islands and fancy appliances. Outside, there's a saltwater pool and a barbecue/entertainment nook. The asking price is $1.888 million.