Everyone knows Aspen as a top-notch winter resort town. But outdoor enthusiasts will enjoy it in the summer, too, when the mountains become a perfect setting for hiking, biking and horseback tours. Some may be surprised to find it’s a top romance destination—but after all that outdoor exercise, who wouldn’t want to repair to a luxurious hotel room or a cozy, firelit bar?

Made up of St Croix, St John and St Thomas, the laid-back USVI offer sophisticated dining, turquoise waters and quaint towns. On St Croix, Christiansted's colourful Danish Colonial buildings provide a lovely backdrop for dining or sailing, and underwater coral gardens are heaven for divers. On St Thomas, shopping mecca Charlotte Amalie has hopping nightlife. Tranquil St John offers quiet trails, secluded coves and lively Cruz Bay's shops and bars. Ferries and local air services link the islands.

Beyond its epic theme parks and perfect weather, Orange County is celebrated for outdoor dining, entertainment and beach-bound adventure. Treat yourself at South Coast Plaza for the finest in luxury shopping and superlative restaurants. Spend an afternoon aboard a whale watching cruise in Newport Harbour, or cast a reel from the Huntington Beach Pier. Stop to smell the flowers at the Sherman Library and Gardens, or explore Laguna’s vast variety of boutique shops along the Pacific Coast Highway.

The tiny hamlet of Jaco is located in the Pacific Coast province of Puntarenas, Costa Rica. It’s the ultimate hideaway for sun seekers and active travelers, with cinnamon-hued volcanic-sand beaches, lush green rain forest and verdant mountains. Surfers flock here from around the world, but families, and honeymooners also find much to love, thanks to the multitude of beaches, outdoor activities, dining, shopping and nightlife. Explore the Costa Rican rain forest by horseback, learning about the flora and fauna in this impressive eco-system. Take an ATV tour to beaches, remote villages and waterfalls. Try your hand at sport fishing, paragliding, sea kayaking or even bungee jumping. Spend an afternoon at the Pura Vida Gardens and Waterfalls, where you’ll find millions of plants, flowers and orchids from around the world. Zip line through the jungle, play a round of golf or take an aerial tram tour of the rain forest. Expert surfers will want to check out La Roca Loca and Playa Hermosa for a challenge.

The oldest university in the world isn’t Oxford or the Sorbonne—it’s the University of Al-Karaouine, and you’ll find it in Fes el Bali. This walled city, a UNESCO World Heritage Site, will transport you back to mediaeval times. Visit the ancient maze-like quarters of the Medina to Fes el-Bali and the four imposing Gates of Fes, with their distinctive Moroccan tile work. You can walk, or, if you're brave, take a taxi—the daredevil drivers will have you hanging on for dear life.

Avignon charms visitors with its ancient streets, restored mediaeval ramparts and the immense Gothic architecture of the Palais des Papes (Palace of Popes—the papacy was based here in the 14th century). The annual Festival d'Avignon, a major arts festival, attracts hundreds of thousands of visitors for theatre, dance, film and street performances.

Acclaimed for their medical benefits since 1522, 200 spa houses had sprung up in this picturesque valley by the end of the 16th century. Its curative springs have won fame as the answer to a slew of metabolic and gastric difficulties. Today’s treatments range from aquatherapy to drinking the mineral-rich water.