A great anniversary gift for your wife would be a curated book of national parks around the United States. The book can have pictures of various national parks and also brief descriptions of each, so she can learn more about the ones she hasn't visited yet. You can also include a personal message to let her know you appreciate her love for exploring and that you look forward to more adventures together. Another idea could be to plan a weekend getaway to a national park that you both haven't visited yet. This would allow you to make new memories together while doing something she loves.
Or you can get her 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.