In Jurmala region we visited the Kemeru national park an hour outside Riga. We did a 5 km hike around the swamp there, but there are definitely more beautiful hikes to do. On the way home we stopped by the long beach called Jurmala (the same train to Riga passes by there) and had a beer at the beach. Also worth it!
Read more in my blogpost (link on the first page).