Tallinn

Why it matters: Humana Estonia has run this Old Town vintage shop since the early 2000s as part of a nonprofit reuse chain that has spent over 20 years funding education, healthcare and community development projects in Angola, Mozambique, Malawi, Zimbabwe and Zambia. Every retro coat or pair of boots you buy on Aia funds that work. The racks turn over completely every five weeks, so regulars swing by on new-collection Mondays for first pick of Soviet-era finds and genuine European vintage. It’s a two-minute walk from the Old Town’s Viru Gate.

Why it matters: run by a nonprofit since 2004, Uuskasutuskeskus (Reuse Centre) keeps roughly 250,000 items a month out of landfills and channels support to more than 50 charity partners across Estonia. The Tatari 64 shop is the chain’s biggest and most central – a warren of secondhand dishes, books, clothing and furniture at prices that make it Tallinn’s favorite eco-souvenir stop. Dig for old Soviet-era glassware or a stack of quirky Estonian paperbacks, and bring cash for the smaller odds and ends. Tram 3 or 4 to the Vineeri stop drops you right outside.