Rione Aia Piccola is a charming district in Alberobello, known for its hundreds of trulli houses, offering a glimpse into the town's history. This is the more tranquil and authentic part of Alberobello (the most intriguing in my eyes), with many houses still inhabited by locals, so it's important to be extra respectful when wandering these residential streets. Here you can also see Casa D'Amore, a historic house dating back to 1797.
You can also explore this area with a guide (link below).