Princess Cruises is celebrating 50 years of cruising and kicking off its Wave season with the cruise line’s biggest sale ever featuring savings on vacation destinations around the globe.

During the Princess Cruises 50th Anniversary Sale, guests can save up to $500 per person on all cruise vacations seven days and longer, sailing between May and December 2015.

In addition to these special savings, guests will enjoy free dining for two at one of the line’s specialty restaurants and receive up to $200 per stateroom of free onboard credit to be spent as they wish.

Guests can also bring along friends and family and save up to 50 percent on third and fourth guests in a stateroom. They can additionally reserve their cruise with a reduced, refundable deposit of only $100 per person.

Examples of 50th Anniversary Sale cruise deals include:

Alaska cruise — 7 days: from $599 interior; $1,299 balcony

Grand Mediterranean cruise — 12 days: from $1,899 interior; $2,499 balcony

Scandinavia & Russia cruise — 11 days: from $1,799 interior, $2,199 balcony

Caribbean cruise — 12 days: from $549 interior, $799 balcony

Mexico cruise — 7 days: from $549 interior; $799 balcony