Visit the Cylburn Arboretum for walking trails through colorful, plush gardens. There are more than 20 gardens and more than 3.5 miles of trails. The mansion onsite was built during the civil war and is now home to the Cylburn Arboretum Association and Baltimore City Recreation and Parks. The Carriage House has natural history collections on display for families to check out, too. The property is free and open to the public year-round. Hours vary according to to season: Tuesday through Sunday, 8 a.m. to 5 p.m. in the winter, and until 8 p.m. in the summer. The Carriage House is closed in January and February, and open March to December on weekends from noon to 4 p.m. The Mansion is open Tuesday through Friday in the summer from 8 a.m. to 3 p.m., except on days when summer camp is held; closed in the winter unless visitors make appointments in advance.