Hello!
We just returned from a fantastic week in Iceland. We are a family of 4 (2 adults and 2 teens).
Some of the highlights for us:
Snorkeling in Thingvillir.
Gulfoss.
Driving the south coast.
Walking behind the waterfall at Seljalandsfoss.
Diamond Beach.
Jökulsárlón Iceberg Lagoon.
Black Sand Beach Reynisfjara.
Sólheimajökull Glacier.
Spending a night at Camp Boutique.
Blue Lagoon.
We found Iceland very easy to navigate (not too many roads and everyone spoke English). We also loved the volcanic and glaciated landscape. The endless beaches are magic.
Happy to answer any questions about visiting Iceland. I am not an expert but just got home two days ago so the experience is very fresh in my memory.
R