The Emmett Till and Mamie Till-Mobley National Monument became the country’s 425th national park today, on the 82nd anniversary of Emmett Till’s birth. The new national monument includes sites in the Mississippi Delta and in Chicago. Learn more at: https://t.co/0HqEMksPhD

🐊 100 Years of Bryce Canyon, over 50 Million Years of Fossils! Our centennial Geology Festival is scheduled for next Friday, July 14 and Saturday, July 15 and will include guided hikes, geology programs and interactive family-friendly booths. https://t.co/7XFaTThxki

Happy Birthday to us!!! 🥳🎂🎉 On July 1, 1941, Mammoth Cave became our 26th National Park.

Cedar Hill, Frederick Douglass' Washington, DC area home, is a National Park Site and is reopening to the public on July 4th! https://t.co/6qtihLSxOD @FredDouglassNPS #FrederickDouglass #Speech #4thofJuly

#OTD in 1919, delegates signed the Treaty of Versailles, officially ending World War I. The Senate failed to ratify the treaty, so a separate document was signed by the U.S. & Germany in 1921. The World War I Memorial recognizes the 4.7 million Americans who served in the war.

Shavila; the Dena’ina word for rainbow. This eye-catching curiosity is a common occurrence in Lake Clark National Park and Preserve, often providing feelings of optimism, inspiration, and revitalization. What emotions do rainbows instill in you? NPS Photo/K. Knick

Fourth of July at Sagamore Hill is coming soon! Check out our website or other social media platforms for more information.

June 28, 1965: Pecos National Historical Park, NM. Buddy Fogelson and his wife, actress Greer Garson, provided land and funding for the Pecos Visitor Center. They owned the Forked Lightning Ranch that became part of Pecos after their deaths. @NatlParkService #TodaysParkFact

June 27, 1990: Petroglyph National Monument, New Mexico. Petroglyphs are carved into rock; pictographs are painted on rock. This park includes carvings by Puebloans dating from the 1300s-1600s and some by Spanish settlers in the 1700s. @PetroglyphNPS #TodaysParkFact

June 24, 2016: Stonewall National Monument, NY. The first national park focused on LGBTQ history, it includes the site of the Stonewall Uprising in 1969, which is regarded as the catalyst for the LGBTQ civil rights movement. https://t.co/iNMspBBQRN @StonewallNPS #TodaysParkFact

June 23, 1910: Big Hole National Battlefield, MT. The site of the August 9, 1877 attack on the Nez Perce camp which killed 90 Nez Perce and 31 attackers. Subsequently the Nez Perce stole 200 Army horses and mules as they fled toward Canada. @BigHoleNPS #TodaysParkFact

June 22, 1948: Hampton National Historic Site, MD. At one time the largest private home in America, it was owned by the Ridgely family until 1948. Each room has been restored to reflect different eras from the late 1700s through the 1920s. @HamptonNPS #TodaysParkFact

June 21: Happy #SummerSolstice! At Hovenweep National Monument the Holly Petroglyph Panel is known as the solstice panel. For a few days before and after the solstice, a sunbeam enters the narrow opening and lights up its spiral and circle petroglyphs. #TodaysParkFact

June 20, 1935: Big Bend National Park, TX. A river runs through it, and it actually gets its name from that "big bend" in the Rio Grande. The park is bigger than the state of Rhode Island- but everything is bigger in Texas. @BigBendNPS #TodaysParkFact

June 19, 1948: Fort Vancouver National Historic Site, WA, originally built by the Hudson Bay Company in 1825. When the Columbia River froze in 1847, officers of the Hudson Bay Company and officers of the Royal Navy's Modeste played curling matches. @FtVancouverNPS #TodaysParkFact

Answer to today’s question: A. The Painted Wall in Black Canyon of the Gunnison is 2250’ high, the tallest in the state of Colorado. The lighter colored "paint" granite is pegmatite. It contains large crystals of quartz, mica, and feldspar. @NatlParkService #TodaysParkFact

June 18: Today's @NatlParkService question: The Painted Wall in this national park is the tallest cliff in the state. Is it A: Black Canyon of the Gunnison; B: Canyonlands; Grand Canyon; D: Yellowstone. #TodaysParkFact

June 17, 1775: Abigail Adams and her son John Quincy Adams witness the Battle of Bunker Hill. With John Adams a delegate at the Continental Congress, Abigail wrote letters to him reporting on British military actions around Boston. @AdamsNPS #TodaysParkFact

June 16, 1933: Blue Ridge Parkway, NC and VA. The 469-mile parkway runs along the ridge of the Appalachians and links @ShenandoahNPS and @GreatSmokyNPS national parks. Weather and road conditions permitting, it is open all year. #TodaysParkFact

June 15: Today through the 18th Fort Union Trading Post National Historic Site hosts its 40th annual Rendezvous. The event brings to life the fur trade era of the early 1800s and features demonstrations like trade negotiation and shooting. https://t.co/dWtYqDVLp3 #TodaysParkFact