San Juan Island offers a variety of activities and experiences that cater to different interests. One of the most notable attractions is American Camp, a historical site that provides insights into the island's past. Visitors can explore the scenic landscapes, enjoy hiking trails, and observe wildlife in this expansive area.

Another significant location is San Juan Island National Historical Park, which includes both American Camp and English Camp. This park is ideal for those interested in nature and history, featuring trails that connect historical sites and offer beautiful views of the surrounding waters.

For those who enjoy marine life, whale watching tours are a popular activity. The waters around San Juan Island are frequented by orcas and other marine species, making it a prime spot for observing these animals in their natural habitat. Several tour operators provide opportunities for visitors to experience this firsthand.

Additionally, Lime Kiln Point State Park is renowned for its lighthouse and whale watching opportunities. The park features trails that lead to stunning viewpoints and picnic areas, allowing for a relaxing day in nature.

Art and culture enthusiasts can explore Friday Harbor, the island's main town, which is home to galleries, shops, and local eateries. The town hosts various events throughout the year, providing a glimpse into the local community and its vibrant culture.

For those interested in outdoor activities, kayaking is a popular choice. Paddling along the coastline provides a unique perspective of the island and its marine environment. Many local companies offer rentals and guided tours for both beginners and experienced paddlers.

Finally, visiting local farms and markets can provide a taste of the island's agricultural offerings. Many farms welcome visitors for tours and tastings, showcasing the region's fresh produce and artisanal products.

Overall, San Juan Island presents a blend of natural beauty, history, and local culture, making it a worthwhile destination for various interests.