Geography of Cardiff Penylan, Plasnewydd, Gabalfa, Roath, Cathays, Adamsdown and Splott ward on the north and east of the city centre, and Butetown, Grangetown, Riverside and Canton to the south and west. The inner-city areas to the south of the A4161 road (known as the "Southern Arc") are, with the exception of Cardiff Bay, some of the poorest districts of Wales with low levels of economic activity. On the other hand, Gabalfa, Plasnewydd and Cathays north of the 'arc' have very large student populations, and Pontcanna (situated north of Riverside and alongside Canton) is a favourite for students and young professionals. Penylan, which
Cathays under the Freedom of Information Act show that over 70% of the houses in Cathays are now HMOs. The buy-to-let market has deterred young couples, families and first time buyers from setting up home in the area. Cathays High School is an 11-18 mixed comprehensive school that started as a boys Grammar school in 1903 and became a comprehensive high school in 1973. Despite the urbanisation of Cathays there is extensive parkland around the civic centre, including Gorsedd Gardens, Queen Alexandra Gardens, Bute Park and Blackweir. The area is served by Cathays railway station in the east of the area