One great idea could be to buy tickets to a museum exhibition that he's been wanting to see. If you want to make it a bit more special, consider booking a private guided tour or signing up for a workshop or behind-the-scenes tour. This way, your boyfriend will get an experience he'll really enjoy and remember for years to come. Another idea could be to create a scrapbook or photo book of all the museum exhibitions you've visited together or ones you're planning to see in the future. You could also surprise him with a piece of artwork or a book related to an exhibition he's been particularly interested in.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.