It was easier than I thought it would be , don’t be put off by the reviews. Yes it’s a 3rd party but your collected by a driver, taken to port, go through security leaving, the boat takes 30mins, when at kos you go through passport control and on way back same, but all together took less than 30mins and you have to go through passport control 4 times ! The drivers are waiting for you when you get back , the boat comes back at 6pm, so I would suggest being at the port in kos approx 30mins before
Just across the water from Turkey is the Greek island of Kos. Known for its beautiful sandy beaches and classical antiquities, a catamaran or ferry ride will take you to its capital, Kos town, where you'll have the day to explore on your own.
Prepare to be charmed by the town, where ancient and modern sit side by side. Dip into the shops and boutiques in the streets behind the harbour or sip coffees in the square, admiring the huge plane tree – it's said that Hippocrates held lessons under it 2,400 years ago. And admire the sea views from the battlements of the 15th-century Knights' fortress. History lovers will also want to see nearby Asklepieion. One of Greece's most important classical sites, its marble temples mark where the world's first hospital once stood.
Or if you fancy some R&R, take your pick of the town's beaches. Its shores are laced with sandy sweeps perfect for getting in some sunbathing and swimming before your ride back. And remember, you'll need to cross the borders – sometimes with lengthy security and passport checks – between Turkey and Greece in this tour, so a valid passport or photo ID is needed.