You might want to get your camera out and head to Belgium Pier— just one of the landmarks located 0.5 mi (0.8 km) from central Blankenberge. It's also full of great chocolate shops and restaurants, so you can spend the afternoon having a wander.
Explore the great outdoors at The Potiniere, a lovely green space in Klemskerke. Check out the shops and local chocolate shops in this walkable area.