The Josiah Henson Museum and park, home to the 19th Century Riley plantation where Henson was enslaved, opens April 23, Montgomery Parks, which is part of Maryland National-Capital Park and Planning Commission, announced. Visitors must register and pay for tickets on line. Walk ins will not be admitted. Tickets are $5 for adults ages 18 … Continue reading Josiah Henson Museum Debuts Friday; Tickets Available Now