The largest of the Isles of Scilly has packed a lot of history onto its shores. The RNLI lifeboat service has maintained a station here since 1837, saving numerous lives along the Cornish Coast. The Star Castle at the Garrison was ordered by Queen Elizabeth I after the attack of the Spanish Armada. Harry’s Wall is the remains of a fortification built in 1551 to defend against an expected French assault. The beacon of the island’s 14-meter metal lighthouse is visible for 17 miles. The round Telegraph Tower is where Guglielmo Marconi picked up the wireless signal from 30 miles away, and British Prime Minster Harold Wilson retired here and is buried here.