Photos courtesy Boston Landmarks Orchestra

Looking for a cool way to relax on a Wednesday evening in Boston this summer? The Boston Landmarks Orchestra is hosting a series of six free concerts at the Hatch Memorial Shell at the Charles River Esplanade. This year marks the 90th anniversary of this annual tradition.

All concerts start at 7 p.m. on Wednesday, from July 17 to August 21. Here’s the lineup.

July 17—Symphonic Space Odyssey: 50th Anniversary of the Moon Landing celebrates the first lunar landing by pairing custom visuals produced by the Hayden Planetarium with symphonic music inspired by the moon and outer space. The Boston Landmarks Orchestra and the Museum of Science in Boston collaborated on this program.

The rain date is Thursday, July 18. If there’s rain on July 18, the program will be held at the First Church at 11 Garden Street in Cambridge.

July 24—The Longwood Symphony Orchestra will perform works to be determined. Check the Boston Landmarks Orchestra concerts page for updates.

If it rains on July 24, this concert will be cancelled.

July 31—Deep River features the Boston Landmarks Orchestra performing a selection of songs and spirituals by African American composers.

The rain date is Thursday, August 1. If there’s rain on August 1, the concert will be held at the First Church at 11 Garden Street in Cambridge.

August 7—The Mercury Orchestra presents two rarely performed Irish orchestral works, Charles Villiers Stanford’s “Phaudrig Crohoore” and Amy Beach’s Gaelic “Symphony in E minor”

If it rains on August 7, this concert will be cancelled.

August 14—The Annual Green Concert features a program of photos and video, accompanied by video, which addresses the environmental effects of climate change. There’s also a new film that was shot in Antarctica. The Boston Landmarks Orchestra and New England Aquarium collaborated on this program.

The rain date is Thursday, August 15. If there’s rain on August 15, the concert will be held at the First Church at 11 Garden Street in Cambridge.

August 21—Landmarks Dance Night features music inspired by the Romani, Hatian, and Vodou cultures, along with West African drumming. Young professional dancers from the Boston Ballet closes the concert with a performance.

The rain date is Thursday, August 22. If there’s rain on August 2, the concert will be held at another venue. Check the Boston Landmarks Orchestra concerts page for updates.

An American Sign Language (ASL) interpreter will be available at the July 17, July 31, and August 14 performances.

Check the Boston Landmarks Orchestra website for more information about the performances, weather updates, and other programs.