Camp McDonald Day in Kennesaw

Inaugural Camp McDonald Day events, 7 a.m. until dark today for guided tours of the actual camp site in downtown Kennesaw, period re-enactors and living history displays. Free. CampMcDonaldPark.org.

Fishing Derby in Jonesboro

Fishing Derby, 8 a.m. to noon today, July 11, Aug. 1, Clayton County International Park, 2300 Highway 138 SE, Jonesboro. $5. ClaytonParks.com, 770-477-3766.

Peachtree Corners Festival

Peachtree Corners Festival, 10 a.m. to 6 p.m. today and noon to 5 p.m. Sunday, The Corners Parkway at Woodhill Drive. Free admission, free on-site parking. PeachtreeCornersFestival.org, 770-367-3127.

Lavender Festival in Roswell

Roswell Lavender Festival, 10 a.m. to 5 p.m. today, Barrington Hall, 535 Barrington Drive, Roswell to discover the varieties, uses and folk remedies associated with the ancient plant of lavender with demonstrations, children’s activities, antiques, vendors, food samples and music. Free. RoswellGov.com/index.aspx?nid=1719, 770-640-3855.

Mountain Garden Day in Blairsville

Mountain Garden Day, 10 a.m. today, Byron Herbert Reece Farm and Heritage Center, 8552 Gainesville Highway, Blairsville with “Thrillers, Spillers and Fillers: Creating Summer Garden Pots” by Master Gardener Shirley Cole from 10:30 a.m. to noon, free cornbread, music and stories by “Women of Heart” and several free potted plants to be given away. $4, free for 11 and under. ByronHerbertReeceSociety.wordpress.com, ReeceFarm.org.

Atlanta Cycling Festival

The Atlanta Cycling Festival is a free, week-long bicycle festival today through June 20, connecting cyclists of all ages and experience levels with each other and supporting local bike-friendly businesses and organizations. AtlantaCyclingFestival.com/events.html.

‘Plaza Suite’ in Snellville

“Plaza Suite” by Neil Simon, 8 p.m. Fridays and Saturdays, 2:30 p.m. Sundays through June 28, New London Theatre, 2338 Henry Clower Blvd., Snellville. NewLondonTheatre.org, 770-559-1484.

‘Art in the Park’ in McDonough

“Art in the Park,” noon to 4 p.m. today, McDonough Square for artists to set up their artwork on display for free. McDonoughArts.net.

Possum Trot in Roswell

Possum Trot 10K/1 Mile for ages 5 and over, 7 a.m. start time Sunday, Chattahoochee Nature Center, 9135 Willeo Road, Roswell. $15-$30. ChattNatureCenter.org, active.com/roswell-ga.

Science Cafe in Atlanta

Science Cafe on “Bioluminescence” with Dr. David Gruber of City University of New York, 2 p.m. Sunday on second Sundays through October, Mershon Hall, Atlanta Botanical Garden, 1345 Piedmont Ave. Free with garden admission. $12.95-$18.95. Atlantabg.org/events-classes/events/science-café.

‘Movies by Moonlight’ in Union City

Union City’s “Movies by Moonlight” with “The Amazing Spiderman 2,” 7:30 p.m. Sunday, Ronald Bridges Park, 5285 Lakeside Drive. Bring your blankets, chairs and picnic baskets. Facebook.com/UnionCityGovernment.