Small ship line Atlas Ocean Voyages is to operate 27 itineraries in Europe in 2025.
More than 50 new ports feature in the newly-released sailing schedule from the US-based expedition cruise specialist.
The company is due to add a fourth ship, World Seeker, next year to join sister vessels World Navigator launched in 2021, World Traveller in 2022 and World Voyager last year.
Two more ships, World Adventurer and Wold Discoverer, are also due to be added to the fleet. Each carries less than 200 passengers.
The 2025 programme is split into epicurean expeditions to the Mediterranean and cultural cruises in northern Europe.
Itineraries include London to Glasgow, Edinburgh to Trondheim and a round Ireland cruise from Dublin.
A second passenger sails free promotional offer is available on all 2025 Europe sailings for bookings made by March 5.
Chief executive James Rodriguez said: “The 2025 European season highlights our ongoing dedication to exploration, cultural enrichment, and the spirit of adventure.
“With each port of call, we invite our guests to discover the heart of these remarkable destinations.
“Our year-round expeditions offer an adventure for every explorer, a testament that there is more than one way to explore the world.”