Just as Dublin has Trinity, so Belfast has Queen's. It's the city's top university and a center of green and calm. Neo-Gothic and neo-Tudor buildings mingle with less majestic fare. Over 20,000 students attend, so if you come in term-time there's plenty of people-watching to be done as the campus goes about its business.
It was founded in 1849 and its main building was designed by Charles Lanyon. However, the main pleasure for the visitor is less its history and more just strolling around the grounds enjoying the tranquil enclave and the toney streets surrounding the campus.
You can walk to the University from the center of town, or catch bus 84.