More than 300 days of sunshine annually (more than San Diego or Miami Beach) earns Denver high marks with visitors and make sunglasses a must. For the city's most energetic shopping, dining and entertainment spots, point your compass in the direction of Larimer Square, the Tivoli, LoDo and the 16th Street Mall.

The capital of French Polynesia, Papeete is a veritable island paradise with bright cerulean waters, iconic overwater bungalows, and palm trees galore.

A lesser-known river port in the Mekong Delta, Sa Dec was once the capital of Dong Thap province of southern Vietnam. Today, it is best known for its flower gardens and authentic bustling market. The city is also famous as the setting for French writer Marguerite Duras' 1984 novel, The Lover, and its 1991 film adaptation of the same name.

Calvi, a picturesque gem on the northwest coast of Corsica, France, enchants visitors with its blend of rich history, rugged landscapes, and sparkling Mediterranean waters. This charming seaside town is dominated by its iconic citadel, a formidable 15th-century fortress that stands sentinel over the turquoise bay.

Basel is the global center of the pharmaceutical industry, but most travelers visit for the world-famous ART Basel festival, as well as the numerous art galleries, iconic architecture and museums.