3 weeks in Sicily, but taking it slow...

Hello,
I stayed in Catania a busy City which I loved (Castle Orsino, Roman Ruins, Duomo and Piazza's plus large boulevard Via Etnea for shopping and a bustling port -Siracusa which is amazing with a very laid-back vibe, Ear of Dionysius. Archimedes. Duomo, great restaurants, beaches, Roman ruins, Cathedrals and piazza.s- I did a Godfather tour in Savoca, (The movies with Al Pacino) of Bar Vitelli and the village where the wedding of Michael Corleone and Appollonia was filmed which was amazing...Bar Vitello is open, and you can eat and drink there so if you a fan of The Godfather movies it is awesome! I also think Agrigento is not too be missed so if you can see The Valley of The Temples, you should do so.

Must Sees:
Palermo - Monreale, Palermo Cathedral, Palazzo dei Normanni, Mondello (beach), Fontana Pretoria
Trapani - Erice
Cefalu’ - beach
Segesta!!!
Agrigento - Valle dei Templi
Ragusa, Scicli, Noto
Siracusa - Ortigia
Catania - Mt Etna excursion will be perfect
Villa Romana del Casale

Eat as many arancini, gelato (get brioche), blood oranges, panelle sandwiches, chocolate bread as possible!

Quick thoughts. Can answer in more detail if you need.

A couple more must sees, Zingaro and Vendicari.
Masseria Bannata isn’t exactly an Agriturismo but may be what you are looking for, great people and food.
In late spring the pools in Sicily may not be very warm yet.
https://www.bannata.com/

Since you like smaller towns, ruins and beaches I am going to suggest Mazara del Vallo with a daytrip to the beautiful ruins in Selinunte, both of which are right on the coast with beaches nearby. Mazara del Vallo's historic center is not very big and is a warren of narrow alleyways, many with tiled wall plaques depicting the history and culture of the area, all great for wandering. The town has Tunisian influence due to its relative proximity to Tunisia and even has a casbah area. Make sure to visit the small museum which houses the ancient Greek bronze statue of the Dancing satyr which was pulled out of the sea by fishermen in 1998 in the area. With a car it would be easy to drive to Selinunte about 35 km to the Selinunte Archeological Park. The park is extensive and unlike Agrigento, not crowded at all. There are multiple ruins and you are given free range. You can choose to walk or there is a system of hop on hop off golf carts that take you to the various sites at the park. I think that teens would really enjoy this park. Mazara del Vallo is also close to Marsala, wine country and the nearby salt pans Look at Baglio Donna Franca near Marsala for an agriturismo. I have a Sicilian cousin who lives in a town outside of Palermo and she recommended I visit the island Favignana but I have never gotten there. Your teens would probably love Scopello and the beaches at San Vito lo Capo. A pretty little laid back beach town in that general area is Castellammare del Golfo. In Palermo or if you are on the eastern side of the island, try to attend a puppet show. Cefalù is a pretty town, again, right on the sea. Nearby there are castles in the hill towns of Castelbuono and Caccamo. Kids always like castles.

I thought the charms of the Egadi Islands were rather subtle and regretted spending a day going out there, but I'm not a beach person and need scenery to be dramatic if I'm going to go out of my way to travel to it. Next time I'll probably try the Aeolian Islands.

With three weeks I’m confident you’ll be including the major sights like Agrigento and Villa Romana. As fans of ruins you might also enjoy Morgantina, not far from Piazza Armerina/Villa Romana area. It’s a Greek settlement, weathered, overgrown, with sun bleached signage that shows little useful information. BUT, it was incredibly evocative, spectacularly set in the hills with views of Etna, and I was the only person there. It’s worth a look.

The Museo Paolo d’Orsi in Siracusa is a hidden gem. In fact, I would make the case that it’s the only archeological museum you really need to visit in all of Sicily.

For the relaxing beach experience, I’d vote Cefalu. I loved it. Great beach, fantastic aperitvio scene in front of the Duomo, and no shortage of good restaurants. My few days here just flew by.

Palermo is my vote for most underrated city in Europe, or at least carries the most misconceptions. I found it to be clean, sophisticated, hip and cosmopolitan. An amazing city to explore. Don’t short change it.

Food. Sicily is made for adventurous eating and you’ll be rewarded. Pasta with sardines was world changing. Order anything and everything that has pistachio or almonds. This goes double for anything with ricotta! The best cannoli will be the ones you order for dessert in a restaurant because they will fill them moments before they serve them. Bakery ones are also good, but are typically filled and ready before you order. It makes a difference!