Grand Gulf State Park is a unique geological formation located in Thayer, Arkansas. The park is known for its spectacular limestone canyon, which is sometimes referred to as the "Little Grand Canyon." The canyon is nearly a mile long and up to 125 feet deep, and was formed by the collapse of an underground cavern.

One of the main reasons to visit Grand Gulf State Park is for the hiking and nature viewing opportunities. There are several hiking trails that wind through the park, offering stunning views of the canyon and the surrounding forest. The park is home to a variety of wildlife, including deer, turkey, and the occasional black bear.

In addition to the canyon, there are several other points of interest within the park, including a natural bridge, a sinkhole, and several caves. The park also has a campground and picnic area, making it a great spot for a day trip or overnight stay.

Interesting facts about the area include the fact that the canyon was once used as a hideout by the infamous outlaw Jesse James. Additionally, the area was used as a filming location for the movie "Gone with the Wind."

The best time of year to visit Grand Gulf State Park is in the spring or fall, when the weather is mild and the leaves are changing. Summers can be hot and humid, while winters can be cold and snowy, so it's best to plan accordingly.