Rundetaarn - Observatory from 1642, a great view of old Copenhagen. Exhibitions and music. Copenhagen History Tours - Historic walks in Copenhagen. Each tour focuses on one century. During the walks you will be taken into the life of the city in that particular century. First United - An incoming agency specialised in providing destination management and PCO services to professional incentive houses and travel agencies. Tumlare Corporation - Offering group travel arrangements, special interest tours and meetings and incentive groups. Copenhagen Portal - Information about sightseeing, transport, shopping, and average prices. Cruise Copenhagen - Offers information on cruises throughout Northern Europe. Tivoli - One of the world's oldest amusements parks right in the centre of Copenhagen Seen It Done It - Copenhagen restaurants, hotels, sights, shops. Photo and information.