Another gem in Santorini, Kamari Beach, is a long stretch of black volcanic pebbles that offers a more upscale, resort-like vibe. Lined with stylish restaurants and beachfront hotels, this beach ...

Yes, Pebbles plural, because there's a lower-end black and white model and a fancier color one with heart rate monitoring.

Pebble is back and is betting that a 30-day battery life can shake up the smartwatch market dominated by Apple Watch.