Dover Castle

England's largest castle and a key to the kingdom, dominating the White Cliffs with 2,000 years of history. This massive fortress features a Roman pharos, Saxon church, Norman keep, and secret wartime tunnels that helped win WWII. It sits in Canterbury's Cathedral Quarter, close to the other main sights. It ranks among Canterbury's most visited sights, and for good reason - most itineraries include it on day one. Tickets cost £23 adult, £14 child, family tickets available and 4-6 hours is enough to see everything without rushing.

Priority: High - do not skip Time needed: 4-6 hours Best for: experience 2 Skip if: You prefer indoor attractions or have limited mobility for extensive walking Cost: £23 adult, £14 child, family tickets available

You'll explore massive castle walls, climb the Norman keep, and descend into claustrophobic wartime tunnels. The views across the Channel to France are striking from the battlements.

Accessibility: Some areas wheelchair accessible including visitor centre and parts of great tower, but many areas involve stairs and uneven surfaces

Experience 2,000 years of defensive history with handsome Channel views. That puts it near the top of any Canterbury visit, and it deserves the spot. Combine it with Canterbury Cathedral and Canterbury Roman Museum - they are close enough to walk between and together make the strongest half-day in Canterbury. Mornings are quieter if you want to take your time.

Skip if: You prefer indoor attractions or have limited mobility for extensive walking

• Book tunnel tours in advance.
• Wear comfortable walking shoes.
• Allow full day for complete visit.

Insider tip: The secret wartime tunnels were Operation Dynamo's headquarters, coordinating the Dunkirk evacuation

striking photography opportunities from castle walls overlooking Channel. Interior photography varies by area.