According to forum posts, Abruzzo offers a range of outdoor activities suitable for nature lovers. Travelers have highlighted hiking in the Gran Sasso and enjoying the scenic trails around Sulmona. The Camino di Celestino near Pacentro provides a stunning hiking route that's less frequented, ideal for encountering local wildlife and flora.

For those interested in historical and cultural sites, L'Aquila serves as a prime location. Some travelers said the city offers a glimpse into medieval architecture with numerous churches under restoration, providing a rich cultural experience. The 99 Cannelle and local museums are also must-visit spots.

Abruzzo is also recommended for its culinary offerings. Travelers have called out L'Aquila as a foodie's paradise with various upscale dining options. Local markets in towns like Sulmona provide an authentic taste of regional specialties, ideal for those looking to indulge in local cuisine.

For recreational activities, forum users suggest biking and skiing depending on the season. The area around Roccaraso was mentioned for its biking routes and is also popular for skiing in winter, offering diverse options for both adrenaline seekers and leisure travelers.

According to forum posts, some of the best hiking trails in Gran Sasso include the area around Campo Imperatore, known as Italy's Little Tibet. It offers a high plateau with scenic views and is suitable for less challenging hikes. Additionally, the trails around Santo Stefano di Sessanio are highly recommended for their natural beauty and historical sites.

Travelers have called out that the hiking conditions in Gran Sasso can vary depending on the season. During late May, for example, higher trails might still have some snow, making them more suitable for experienced hikers or those with appropriate gear. Lower trails, like those around Campo Imperatore, are generally accessible and offer panoramic views without the snowy conditions.

For many users, using local guides or referencing detailed hiking maps has been beneficial, especially when exploring less-known trails or during seasons when trail conditions can be unpredictable. Websites dedicated to the Gran Sasso park and local tourist information centers are useful resources for the latest trail information and safety tips.