The marshland city of Ljubljana is an open-air treasure trove of adventures for the laidback traveler. Simply walking along its quaint streets is a treat to the eyes. Take your time to admire the eclectic combination of Gothic, Renaissance, and Romanesque architecture of its most celebrated landmarks, especially its castle, as you move along. Walk along its numerous bridges, go cruise along the river at night and get stunning views of the city as you see it burst to life with colorful lights, or go rowing around one of its ponds and bask in its serene atmosphere. If you’re looking for a nice place where you can mellow out, Ljubljana is definitely a great choice.