Riga was on the trade route of the Hanseatic League. Many of the guilds had their respective halls around town, many of which are repurposed as event venues.
During WWII, this was a Nazi run ghetto for Jews, most of which were murdered in the forest outside town.
Nav:
The architecture of the city reflects the influence of its stronger neighbors. Look for Scandinavian, German, and Italian influences.
Nosh:
Galerija Centrs is a multilevel shopping mall. Head to the top for a high quality food court and bar area.
Nip:
Lots of good beer, not just light lagers. Cool bars. Interesting liqueurs.