A tipster sent in these photos of an unusual proposal for a backyard pool in Brooklyn Heights. The description said, “105 Willow Street-Brooklyn Heights Historic District. An Eclectic-Diverse style rowhouse built between 1861-1879. Application is to excavate the rear yard.” More specifically, the homeowner proposed excavating the yard 25 feet down, putting in a pool and whirlpool underground with a barrel vault ceiling and a skylight, and an infinity reflecting pool on the top. The underground pool would not, of course, be visible from the outside, but apparently the LPC didn’t like something about the proposal because it was not approved. Our tipster speculated they didn’t like the sound of excavating “the whole backyard.” Potentially, the homeowner could modify the plans and try again.