Flowers from Latvia

From Riga, the capital city of Latvia. The flower stamps are from a long-running annual stamp series issued by Latvijas Pasts. On the left is Freesia from 2017 and on the right are are tulips from 2014. The lighthouse stamp bottom right is also from a long-running series and on this stamp from 2015 is the Salacgīvas lighthouse.

Åland's Underwater Flora and Fauna

On this cover from Mariehamn is an Åland 2024 Europa stamp. The stamp features common eelgrass. There are large fields of eelgrass in the Baltic sea, particularly around the Åland islands. It is home to a thriving ecosystem providing food and shelter for several species of fish, crustaceans and invertebrates.

My flatbed scanner does not present the blue-green hot foil applied to the stamp in all its shimmering glory, as you can see in the image below.