Dublin Zoo is a solid, well-kept classic zoo with decent space for the animals and pleasant walking paths through the park. Expect to spend 2–3 hours here. The habitats are good but not world-class; you'll see lions, giraffes, gorillas, penguins, and the usual crowd-pleasers. It's clean, nicely laid out, and easy to navigate. Families with young kids will get the most out of it. Adults without children often find it pleasant for an afternoon but not a must-do in Dublin.
The best time to visit is spring (April–June) or early autumn. Summers are busy and can feel crowded, especially on weekends. Expect to pay around €20–€28 per adult ticket if bought online in advance; children's tickets are roughly half that, and family packages bring the per-person cost down a bit. Skip the guided tours – they're not especially insightful. Do buy tickets online ahead of time to avoid the queue. If you're short on time or on a tight budget, Phoenix Park itself is free and often more relaxing than the zoo.
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