Caerphilly Castle—Wales' largest and Britain's second-largest castle—sits 12 km (7.5 miles) north of Cardiff. Multiple easy options:
From Cardiff: A470 north toward Merthyr Tydfil → exit for Caerphilly (A469) → left onto Castle Street. Castle on right. Parking: On-site lot (pay), street parking nearby.
Cardiff Central → Caerphilly station (Rhymney Line, frequent). Walk: Station → Castle Street → Castle (well-signposted, 400m).
Stagecoach services from Cardiff (Westgate St / Kingsway) to Caerphilly Town Hall stop. Short walk to castle. Check current timetables.
Direct, door-to-door. ~£15–25 from Cardiff center. Uber/Bolt/FreeNow operate.
Open daily (Cadw-managed; check seasonal hours). Audio guide included. Lean tower (out-leans Pisa!). Great Hall, inner/outer wards, moat, dams. Allow 2–3 hours. Combine with Caerphilly town (cheese market, mountain views).
Whether by rail, road, or bus, Caerphilly Castle is an easy, rewarding half-day from Cardiff.