2. The Scarlet Hotel, Cornwall

The Scarlet is a beautiful, adults-only, eco-friendly hotel overlooking Cornwall's Mawgan Porth Beach - like a little bit of Australia on your doorstep. With clifftop hot tubs, a natural reed-filtered swimming pool and an Ayurvedic-inspired spa - all with panoramic views over the beach and Atlantic Ocean - its perfect for couples who want to combine romance with pampering. Rooms start at £280 ($436) for a two-night minimum stay.