This week, the East End opens its doors to upscale homes for viewing, like the 8-bed, 9-bath home in Water Mill with a $7.4 million tag. It’s roomy with premium features. Other top spots? A 5-bed, 7-bath home in East Hampton for $5.8 million, a 5-bedroom estate in Southampton with a gunite pool, going for $5.5 million, and a big 8-bedroom, 7-bath property in Southampton up for $5 million. This last one even has a heated pool and spa.