Best castles around Caernarfon are situated in a region rich with history and dramatic landscapes. This area of North Wales is known for its strategic coastal positions and mountainous terrain, offering a glimpse into medieval power struggles. The castles here served as both defensive strongholds and symbols of authority for Welsh princes and English kings. Visitors can explore a variety of fortifications, from imposing Edwardian fortresses to native Welsh strongholds.
Last updated: April 22, 2026
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Segontium Romon Fort is an impressive excavated fortification located just outside Caernarfon. It was founded by Agricola in AD77, and it was garrisoned for over three hundred years. It was the longest-held Roman fort in Wales and used to hold a 'cohors milliaria,' a regiment of about 1,000 auxiliary infantry, mainly recruited from Belgium and Germany. It was linked by Roman roads to the main legionary bases at Chester and Caerleon by a series of marching camps and other forts.
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Very nice castle, open in September from 8:30 a.m. to 5 p.m.
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Dolbadarn Castle controlled an important route into the heartland of medieval Gwynedd and was close to rich cattle pastures that provided food and income. Begun in the 1220s, the castle was built in ten years. The round tower consisted of two floors with comfortable accommodation over a basement and was a princely castle... The builder Llywelyn ab Lorwerth died in 1240, and despite his efforts to secure a peaceful succession in Gwynedd, a struggle began that did not find a clear winner until 1255. Llywelyn's grandson, Llywelyn ap Gruffudd, defeated his brothers in battle and became Prince of Gwynedd. But they still posed a threat, and Llywelyn held Owain Goch, his eldest brother, prisoner in Dolbadarn. Here he was held captive for twenty-two long years. The 13th-century poet Hywel Foel ap Griffri described Owain as "a man in the tower, long a guest."
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Dolbadarn Castle controlled an important route into the heartland of medieval Gwynedd and was close to rich cattle pastures that provided food and income. Begun in the 1220s, the castle was built in ten years. The round tower consisted of two floors with comfortable accommodation over a basement and was a princely castle... The builder Llywelyn ab Lorwerth died in 1240, and despite his efforts to secure a peaceful succession in Gwynedd, a struggle began that did not find a clear winner until 1255. Llywelyn's grandson, Llywelyn ap Gruffudd, defeated his brothers in battle and became Prince of Gwynedd. But they still posed a threat, and Llywelyn held Owain Goch, his eldest brother, prisoner in Dolbadarn. Here he was held captive for twenty-two long years. The 13th-century poet Hywel Foel ap Griffri described Owain as "a man in the tower, long a guest."
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Dolbadarn Castle controlled an important route into the heartland of medieval Gwynedd and was close to rich cattle pastures that provided food and income. Begun in the 1220s, the castle was built in ten years. The round tower consisted of two floors with comfortable accommodation over a basement and was a princely castle... The builder Llywelyn ab Lorwerth died in 1240, and despite his efforts to secure a peaceful succession in Gwynedd, a struggle began that did not find a clear winner until 1255. Llywelyn's grandson, Llywelyn ap Gruffudd, defeated his brothers in battle and became Prince of Gwynedd. But they still posed a threat, and Llywelyn held Owain Goch, his eldest brother, prisoner in Dolbadarn. Here he was held captive for twenty-two long years. The 13th-century poet Hywel Foel ap Griffri described Owain as "a man in the tower, long a guest."
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A beautiful, large Castle with many towers you can gogo up to have a great view of the surrounding area. A very rewarding destination for any tour. if you go in, plan at least 1-2 hours to go everywhere, or just admire the walls from outside.
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The primary castles in the area include Caernarfon Castle, a magnificent Edwardian fortress known for its unique polygonal towers. You can also visit Dolbadarn Castle, a significant native Welsh stronghold with an impressive round tower, and Criccieth Castle, perched dramatically on a headland overlooking Tremadog Bay.
Caernarfon Castle stands out with its distinctive polygonal towers and banded stonework, a design intended to evoke imperial Roman architecture. This deviates from the more common circular towers found in other Edwardian castles. It was also the birthplace of Edward I's son, Edward of Caernarfon (later Edward II), making it a symbolic site for the investiture of Princes of Wales.
Dolbadarn Castle is a crucial example of a native Welsh castle, built by Prince Llywelyn the Great in the early 13th century. Its strategic location controlled the Llanberis Pass, a vital route through Snowdonia. It's also notable for having imprisoned Owain ap Gruffydd for 20 years by his brother, Llywelyn the Last.
Yes, you can visit Segontium Roman Fort, located just outside Caernarfon. Built in AD 77, it was once the most important military base in North Wales and was garrisoned for over three hundred years. The grounds are open to visitors, offering a glimpse into Roman history and views over the Menai Straits.
The castles offer diverse and stunning views. From Caernarfon Castle, you'll see the River Seiont and the town. Criccieth Castle provides breathtaking panoramic views across Cardigan Bay and towards Snowdonia National Park. Dolbadarn Castle, situated at the base of Llanberis Pass, offers excellent views overlooking Llyn Padarn and the surrounding Snowdonia landscape.
For Caernarfon Castle, it's recommended to allow the best part of a day to explore its extensive walls, towers, and the Regimental Museum. Dolbadarn Castle and Criccieth Castle can typically be explored in 1-2 hours each, depending on your interest in history and photography.
Yes, Caernarfon Castle, Dolbadarn Castle, and Criccieth Castle are generally considered family-friendly. Children often enjoy exploring the battlements, towers, and imagining medieval life. Padarn Country Park, which includes Dolbadarn Castle ruins, also offers lakeside views and walking opportunities suitable for families.
The spring and summer months (April to September) generally offer the most pleasant weather for exploring the castles and their outdoor surroundings. During these seasons, you'll find longer opening hours and more opportunities for outdoor activities. Visiting in autumn can also be beautiful with changing foliage, while winter offers a quieter experience, though some facilities or access might be limited.
While historic castles often present challenges for accessibility due to their age and design, some efforts have been made. Caernarfon Castle, as a major attraction, offers some accessible routes and facilities. For specific details on accessibility at Caernarfon Castle, it's best to check the official Cadw website. Dolbadarn Castle and Criccieth Castle, being largely ruins on uneven terrain, may have more limited accessibility.
The area around Caernarfon is excellent for outdoor activities. You can find numerous hiking trails, ranging from easy to moderate, with routes like the 'Caernarfon Castle – Afon Seiont loop' or 'Palace Street, Caernarfon loop'. For mountain biking enthusiasts, there are trails such as the 'View of Llyn Padarn – Snowdon Inn Campsite loop'. You can explore more options for hiking and MTB trails around Caernarfon.
Caernarfon, being a major town, is well-served by public transport, making Caernarfon Castle accessible by bus. For castles like Criccieth and Dolbadarn Castle, bus services are available to nearby towns or villages, often requiring a short walk to the castle site. It's advisable to check local bus schedules for the most up-to-date information.
Parking is generally available near the castles. In Caernarfon, there are public car parks within walking distance of Caernarfon Castle. For Criccieth Castle, there is usually parking nearby, often paid. Dolbadarn Castle, located within Padarn Country Park, has parking facilities available within the park, often free or with a small charge.
Visitors frequently highlight the impressive scale and architectural drama of Caernarfon Castle, often describing it as a 'medieval marvel'. The stunning coastal views from Criccieth Castle and the picturesque setting of Dolbadarn Castle within Snowdonia National Park are also highly praised. The rich history and the opportunity to explore these ancient strongholds are consistently mentioned as key attractions.


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