I’m gonna go for a walk. I’ll see you guys in a bit.
As the group enters Riga, Bucky notices something on the ground and feigns going for a walk.
Episode 4 opens with Bucky entering into the Apartment, which Sam and Zemo entered in the previous episode. The interiors of the apartment (shown below) appear to have been filmed on a soundstage.
This street in Riga, is again a street in Prague. The address of the apartment is 23 Karoliny Světlé, and shots of the street are looking North towards Betlémská. Thanks very much to Geektrippers.com for helping to find this location.
(The Falcon and The Winter Soldier S01E03 & E04, 2021)