Prince Charles and Camilla, Duchess of Cornwall spent a hot summer day by the seaside.

The royal couple traveled to Cornwall on Monday for their annual visit to their namesake region. As Queen Elizabeth's heir, Prince Charles has the titles of both the Prince of Wales and the Duke of Cornwall. Camilla has been known as the Duchess of Cornwall since their marriage in 2005, but she does not use the title of the Princess of Wales due to its popular association with the late Princess Diana.

Prince Charles, 73, and Camilla, who celebrated her 75th birthday on Sunday, kicked off their three-day visit in the fishing village of Mousehole. Amid the U.K. heatwave, they both sported sunglasses as they toured Newlyn Harbour. Camilla also carried a parasol to stay shaded from the sun.

But the best way to beat the heat is with ice cream! The duo reportedly shared some during their day out and about.

This year's visit also marked a special anniversary: the 70th anniversary of Prince Charles being head of the Duchy of Cornwall. The Duchy of Cornwall is a private estate established by Edward III in 1337 to provide an income for the heir to the throne.

In honor of the occasion, Prince Charles and Camilla cut an anniversary cake (with a giant sword, no less!) during a garden party at Boconnoc House.