Open'er Festival

Open'er has run since 2002, moving to the Kosakowo airfield outside Gdynia in 2004, and it is the biggest music festival in Poland, drawing crowds in the low hundreds of thousands over four days in late June or early July. The airfield is a working military site the rest of the year, which is why the festival has flat open ground and hangars to work with. The programming is broad - headline international rock, pop, hip hop and electronic acts alongside Polish artists across several stages - and it has won European festival awards more than once. There is a campsite on the site, which is how most younger attendees stay, and shuttle buses run to the Tricity. Being on the coast, it can be hot and dusty or wet and cold within the same weekend, and the field turns to mud quickly. Tickets go on sale months ahead and the earliest tiers sell out.

What you actually see

• A military airfield as a venue - flat ground and hangars, used for four days a year.
• Several stages - international headliners alongside Polish acts.
• An on-site campsite - where most of the crowd stays.
• Low hundreds of thousands - the largest festival audience in Poland.

When to go

Late June or early July. Several days.

Honest expectations

Tickets sell out months ahead. The site floods and turns to mud in rain. Camping facilities are basic for the numbers. Getting in and out at peak times takes hours. Line-ups are announced late.

Nearby

Gdynia and its modernist centre are a short ride south.