Parnu

Why it matters: run by the Sobralt Sobrale charitable foundation with Swedish partner Erikshjalpen, every sale in this secondhand store funds the Hoolime Koos programme, which supports Estonian children and families in need with everything from summer camps to material aid. The big Papiniidu shop is Parnu’s best rummage: used furniture, dishes, clothes, books and the occasional piano, with the stock changing daily. Locals buy the cloth customer bag, which doubles as a loyalty card for a permanent 10 percent discount. Come with time to dig – it is the grandma’s-attic experience, for a good cause.

Why it matters: Uuskasutuskeskus is Estonia’s largest nonprofit reuse organisation, and this Parnu shop is the flagship of its 17-store network, built on the belief that no decent item should end up in a landfill. The constantly changing floor holds secondhand clothing, furniture, books, toys and retro Estonian household goods at pocket-money prices. Hunt for Soviet-era glassware and Estonian design pieces, and drop your own unneeded items at the donation corner while you are there. Find it on the 0-floor of the Port Artur 2 centre, a short walk from the old town.