The main Sidari beach in behind the main road lined with shops, restaurants, bars so basically it is in the centre fo Sidari. Sunset beach is in the village of Peroulades and is a good 45 minute walk; go through Sidari, turn right at The Three  Pigs and when you come to a T junction turn left, this road will go all th eway to Peroulades village, at a water pump in middle of road take the right hand road and you will soon see signs to Sunset beach. It would cost about 8€ if you get a taxi from the rank in Sidari (on the main road just after you pass all the shops). If you walk there you can book a taxi return from the Bar on the cliff top at Sunset beach.