Thăng Long Imperial Citadel in the heart of Hà Nội is hosting the second Cultures of the World Festival, a four-day public diplomacy event running October 1-4 under the theme 'Converging Heritage – Shaping the Future'. Fifty countries and international organisations have set up shop inside the UNESCO World Heritage Site, whose archaeological layers stretch back more than a millennium.

The numbers are substantial: 45 cultural spaces, 35 food-focused booths, free film screenings from 18 countries, performances by 19 international arts troupes and traditional fashion shows from 16 delegations. Türkiye's space is reportedly drawing the biggest crowds, with Russia close behind. Opening-night delegations included Azerbaijan, Bangladesh, China, Indonesia, Israel, South Korea, Laos, Pakistan, Peru and Ukraine.

The timing carries extra weight. The festival marks the 50th anniversary of Việt Nam joining UNESCO, and it doubles as a showcase for the host's own heritage. The 'Việt Nam Đa Sắc' programme put all 54 of the country's ethnic groups on stage, from Huế's nhã nhạc royal court music to quan họ love duets from Bắc Ninh — both recognised by UNESCO. A 3D mapping projection beamed Vietnamese cultural symbols and landscapes onto the citadel itself.

If you're in the capital during the run, the remaining programme is free to dip into: the Việt Nam National Village for Ethnic Culture and Tourism hosts sightseeing and hands-on experiences on October 2, the Colours of the Five Continents street parade takes over October 3, and the Concert of the Five Continents plays on both October 2 and 3, alongside daily film screenings and a closing ceremony on the 4th.

For travellers, this is a rare chance to see a major heritage site used as a living stage rather than a quiet museum. You could sample world cuisine in an afternoon, catch a Peruvian or Ukrainian troupe, then walk through citadel ruins that predate most European capitals. UNESCO World Heritage Centre director Lazare Eloundou Assomo made the point himself: few venues suit a celebration of world cultures better than a site reflecting a thousand years of continuous political and cultural life.

Even if you miss the festival dates, the citadel remains one of Hà Nội's most rewarding stops — and October is prime season in northern Việt Nam, with cooler, drier weather than the summer months.