New Delhi, Sept. 9 -- British adventurer Ross Edgley has made history as the first person to swim around the entire coastline of Iceland, completing a 1,000-mile journey over four grueling months.

The 39-year-old from Cheshire faced towering waves, freezing waters, and even curious killer whales during his ultramarathon swim. He began and ended the challenge in Reykjavik, setting off on May 17 and returning at 5:09 pm UK time on Monday. At the finish line, he celebrated with a sip from a Viking horn.

"This has been the toughest and most ambitious challenge I have attempted yet," Ross said.

"Iceland provided an incredible opportunity to test my physical and mental limits - the country has provided some insane experiences I will never fo...