What is it about high-seas sailing that makes it so romantic? Intimate meals, soothing spa treatments, engaging cultural activities, and beautiful sunsets are all part of the tranquil surroundings. Whatever the attraction, these U.S. News-ranked cruise lines know how to set the tone for a romantic getaway. Here are the five most romantic cruise lines based on a system that considers health ratings, expert evaluations, and couple approval.

Viking Ocean Cruise
Viking Ocean Cruises provides plenty of opportunities to snuggle up with your loved one while soaking in your surroundings, whether it's in the infinity pool, near the common area fireplace, or on your cabin balcony. After taking in the view, unwind in the spacious Wintergarden lounge with a cup of tea or the Nordic spa's snow grotto or sauna.
Seabourn Cruise Line
Seabourn's ships have a maximum capacity of 600 passengers, ensuring a personal experience. In addition, you and your sweetheart may relax with a couples massage or dine elegantly at one of the onboard restaurants, which Michelin-starred chef Thomas Keller oversees. Request that your stewardess place rose petals on your bed to establish the mood in your room.

Azamara
Because Azamara's ships have a maximum capacity of 700 passengers, you'll have no trouble finding hidden spots to cuddle with your special someone. Spend a romantic evening at Prime C, the onboard restaurant, and then retire to the Cabaret Lounge. Through Azamara's cultural immersion program, you should also plan to visit lesser-known ports of call together.
Crystal Cruises
Crystal provides several possibilities to spend quality time with your companion, from its exquisite lodgings (every room has an ocean view) to its modern facilities. Enjoy a sunset from the 360-degree Promenade Deck after a couples treatment in the feng shui-inspired spa. After that, treat yourself to a romantic supper at a specialist restaurant.
Regent Seven Seas Cruise
Regent understands how to turn up the romance with an "elegant casual" dress code and the Serene Spa & Wellness facilities. The all-suite rooms on the cruise line provide plenty of space for you and your loved one to stretch out. Step out of your room for a romantic meal at one of Regent's specialty restaurants, which are included in your cruise fare.
