"It's little wonder that Vietnam's honeymoon capital, with its poetic scenery and picture-perfect landscapes, is the location for an exciting dating show where participants go to put their relationships to the test," the website said.
It recommends that couples take swan-shaped boats to row in the Valley of Love, admire panoramic views from Lang Biang Mountain or enjoy a breathtaking sunrise or sunset at the Xuan Huong Lake.
They can also book a tour to explore the peaceful countryside on the outskirts of Da Lat that is scattered with French-built colonial villas and farms cultivating strawberries.
Zen Valley Dalat, a short drive away from the Xuan Huong Lake, is an ideal accommodation for couples to go rafting, mountain biking and canyoning.
The other five romantic destinations on the list are: Majorca in Spain, Tainan City in Taiwan, Telese Terme in Italy, Avignon in France and Punta Mita in Mexico.
The list is based on the results of a survey of 24,055 respondents in 31 countries and territories planning to travel for business or leisure in the next 12-24 months.