Castle Cornet, located in Saint Peter Port, Guernsey, is an ancient castle with a rich history, offering stunning harbor views and fascinating insights into the island's past. Accessibility might be challenging in certain areas due to the historic nature of the site. It's suitable for both solo exploration and guided tours, the latter providing deeper historical context. Seasonal restrictions may apply, particularly during the off-season, so checking opening times is advisable. Expect to spend approximately 2-3 hours exploring the castle and its various museums. The cost is moderate, with entry fees covering access to all areas.