Munheon Seowon enshrines the Goryeo Dynasty scholar Choe Chung (984–1068) and his sons Choe Yuseon and Choe Yugil. It was a royal-commissioned seowon located in Haeju, Hwanghae-do, authorized by King Myeongjong of Joseon in 1550. Until liberation in 1945, ancestral rites were held there for a long time, but unfortunately, the division of North and South Korea made it inaccessible. After the division, about 200,000 descendants in South Korea established Yeongjeonggak and the seowon in 1991 around 753-2 Naesammi-dong, Osan-si, Gyeonggi-do to enshrine the portraits of Choe Chung and his two sons again. Since then, rites have been held every April, but due to Osan city's urban planning, only Yeongjeonggak remains. The rest of the site has been developed into Munheon Park, freely used by citizens. The rites continue to be performed by descendants of the Haeju Choe clan on the fourth Saturday of April every year.
Dongtan Children's Observatory is located in Jigot-dong, Osan-si, Gyeonggi-do. Established in 2012, it features an outdoor observatory and a night observation dome, offering various hands-on programs. Through a self-developed astronomy program, it teaches children the scientific knowledge hidden in the universe and allows them to simultaneously develop spatial perception and astronomy knowledge through crafting activities.
Jukmi Sports Park is a sports park for citizens located in Geumam-dong, Osan-si, Gyeonggi-do. It has a soccer field, gymnasium, tennis courts, X-game area, jokgu court, basketball court, badminton courts, and futsal field, allowing you to enjoy various sports. Besides sports, you can do light exercise using the workout equipment scattered throughout the park, go inline skating, or take a walk. In addition, a children's water playground opens in the summer, where children can have fun playing.
The New UN Forces First Battle Monument, established on April 6, 1982, was erected to honor the spirits of the Smith Special Mission Unit soldiers who died in the first battle fought between UN forces and North Korean troops during the Korean War. The monument symbolizes the first fortress defended by UN forces against the North Korean army through three high tower structures, with the battle scene of the Smith unit soldiers depicted in the center. Every year on July 5, a memorial ceremony is held to commemorate the significance of the Jukmiryeong battle and to honor the fallen soldiers. The Old UN Forces First Battle Monument, designated as a Gyeonggi-do registered cultural heritage, was originally located at Hill 99 across National Road 1, where one platoon of Infantry B Company was positioned during the Osan Jukmiryeong battle. In 2019, as part of the Peace Park development project, it was relocated to its current location, with the foundation newly made during the move. After the Jukmiryeong battle on July 5, 1950, in 1995, Smith unit soldiers returned and, together with local leaders, piled 540 stones to build it. Until the 1990s, it was commonly called the UN Tower among Osan residents.
Osan Jukmiryeong Peace Park, officially opened on July 5, 2020, marking the 70th anniversary of the Korean War and the first battle involving UN forces (Osan Jukmiryeong Battle), is a historical park created at Jukmiryeong where North Korean and UN ground forces fought their first engagement on July 5, 1950, just 10 days after the outbreak of the Korean War, resulting in many casualties. The park covers a total area of 134,014.7㎡ and includes the old UN forces first battle monument built in 1955 by the US 24th Division, the new UN forces first battle monument expanded and renovated in 1982, the UN forces first battle memorial hall built in 2013, and the Smith Peace Hall established in 2020. It features an observatory, mirror pond, lawn yard, and peace playground, allowing visitors to enjoy peaceful leisure time. Osan Jukmiryeong Peace Park reappraises the first battle of UN forces as the initial history of protecting peace and freedom on the Korean Peninsula and is newly advancing as a peace culture platform under the vision that the value of sacrifice will shine more brilliantly when moving toward a peaceful future beyond gratitude and remembrance.
