Fort Union National Monument is a historic site located in northeastern New Mexico, approximately halfway between Santa Fe and the Texas border. It was established in 1954 to preserve the remains of a 19th-century military fort that served as an important hub for the Santa Fe Trail and a strategic outpost during the Civil War.

There are several good reasons to visit Fort Union National Monument. For history buffs, it offers a fascinating glimpse into the lives of soldiers and civilians who lived and worked at the fort over 100 years ago. It also provides a unique opportunity to learn about the important role that the Santa Fe Trail played in the development of the American West.

Some specific points of interest to see at Fort Union National Monument include the fort's ruins, the Santa Fe Trail ruts, and the visitor center/museum. The fort's ruins include several original buildings, such as the hospital, officer's quarters, and barracks, as well as reconstructed versions of others. The Santa Fe Trail ruts are visible reminders of the countless wagons and caravans that passed through the area during the 1800s.

Interesting facts about Fort Union National Monument include that it was once the largest military post in the Southwest, with as many as 1,600 soldiers stationed there at one time. It also served as a trading post and supply depot for the Santa Fe Trail, and was the site of several battles during the Civil War.

The best time of year to visit Fort Union National Monument is during the spring or fall, when the weather is mild and crowds are smaller. However, the site is open year-round and visitors can enjoy guided tours, ranger talks, and special events throughout the year.