Vientiane Trekking Tours | Laos Hiking Tours From Vientiane- The tranquil capital city of Vientiane maintains a vintage charm with its faded French colonial architecture juxtaposed with ornate, gilded temples. This Southeast Asia's smallest capital and Laos' largest city is such a lovable city, and there is much more to do than you may think. Spend five days visiting around the city in depth and its suburbs, meeting friendly locals, exploring beautiful natural landscapes and experiencing Vientiane through its religion and nature.