We asked you to join us in exploring the past with your photos by introducing Throwback Thursday last week.

Here’s highlights for this week’s throwback assortment:

“A general view looking down on a huge crowd of people filling Ludgate Circus in London probably to watch the Lord Mayor’s Procession held just before the armistice that ended World War I. The dome of St Pauls appears prominently in the background. A large sign on the side of Holborn Viaduct reads To-day Buy War Bonds. Photograph taken probably November 1918 by Thomas Frederick Scales.” – National Library of New Zealand

“Bicyclists in front of Isaac L. Requa residence, Highland Avenue and Hazel Lane, Piedmont, Calif.” Photographer: Rieman & Pray. Undated. – California Historical Society

“Barren tree trunks rising from water in foreground, stream rising from mountains in background, ‘Roaring Mountain, Yellowstone National Park,’ Wyoming.” Series: Ansel Adams Photographs of National Parks and Monuments, compiled 1941-1942, documenting the period ca. 1933–1942. – The U.S. National Archives

“Ryan X-13 Vertijet c. 1955” – San Diego Air & Space Museum Archives

“Self Portrait. Negative Scan. Photo of (and taken by) my husband’s grandfather, Robert Floyd Tacey (b. 07/11/1916 d. 05/19/1996).” – Sharon Drummond

Zero Gravity Ride, U.S. Space and Rocket Center, Huntsville, Alabama, 1984.

“The second tower imploding on the Kingshold Estate during demolition on 23 July 1995.” South Hackney, London, England. – Conor Cotter

To join this series, tweet @flickr with your favorite photos, and include the hashtag #ThrowbackThursday. And if you’d rather not tweet, simply include the same hashtag in your Flickr photo title, or tag it with ThrowbackThursday. We can’t wait to see what time period and subjects show up next in pictures. From old scans to new photos of throwback memories, we like them all.