Book and pay in advance, three slots per day - was...

Book and pay in advance, three slots per day - was a very rainy day when we went, but possibly the first time we ever got around every active exhibit!
Long walk to the Hilltop Tea Room, and a steep stride back down. Picnic advisable, you can buy tea or hot and cold beverages at the Tea Room, and enjoy your picnic outside in the fresh air, lovely views over the North shore of Belfast Lough.
Photo taken overlooking the Giraffe and Elephant House, looking up at the Black Mountain.