The most famous Roman ruin in Britain is a Newcastle day trip rather than an in-city sight. The eastern terminus, Segedunum, is on the Newcastle Metro at Wallsend, but the most spectacular surviving section — the central stretch through the Northumberland National Park — is a 45-minute drive west on the A69. Housesteads, Vindolanda, and the Sycamore Gap make a strong half-day circuit.
For walkers, the Hadrian's Wall Path runs the whole 84 miles of the modern route. Most visitors do a short section near Steel Rigg. Buses run from Newcastle's Eldon Square in summer (the AD122 service); a hire car is more flexible.