This year’s tour will feature 10 homes and landmark churches in the Mount Morris Park section of Harlem, with a focus on the elements in each location that make it special — from grand scope skylights to marquetry and parquetry flooring; from authentic door frames to double-scale master suites; from clawfoot tubs to cutting-edge kitchens; from original staircases in vintage brownstones to elegant add-ons that update contemporary environments.

Refreshments will be available at some key locations.

Tour details include:

► 11 a.m. to 4 p.m.: Follow the Self-Guided Tour of Homes at your leisure. Guests will visit 10 venues including inside brownstone homes, urban live/work apartments and landmark churches.

► 1 p.m. and 3 p.m.: Join the Architectural Walking Tour and explore this historic neighborhood’s rich architectural detail and history.

► 2 p.m.: Join the Marcus Garvey Park Fire Watchtower Walking Tour and follow preservation architect, Angel Ayón, to the top of the acropolis to view the 158-year old cast iron tower, the only surviving structure of its kind in New York City. It was designated a NYC landmark in 1967 and a National landmark in 1976.

► Noon and 2 p.m.: Go Inside & Intimate in Historic Harlem with Yale-trained architect and historian, John Reddick. You’ll explore inside three extraordinary houses in the Mount Morris Park Historic District that are not on the regular tour and ordinarily strictly private. Group size is limited. This 1.5 hour walk requires a separate ticket.

Tickets cost $25 or $50 for the John Reddick tour if purchased in advance, more if purchased at the door. Meet at the Pelham Fritz Community Center, 18 Mount Morris Park West (Fifth Avenue) and West 122nd Street.