The 23nd CSCC Multiconference will be held in the famous Marathon a few kilometers outside Athens, famous for his history (battle of Marathon) https://en.wikipedia.org/wiki/Battle_of_Marathon, for its archaeological museum, historical monuments, medieval monastery of S.Efrem, its famous beaches, mountains, traditional villages and night life. Marathons is a place that each civilized person must visit at least one time in his life.

From marathon you can go to Athens (45 minutes by bus) https://en.wikipedia.org/wiki/Athens Athens is the capital and largest city of Greece. Athens (Greece) is considered the cradle of Western civilization, being the birthplace of democracy, Western philosophy, Western literature, historiography, political science, major scientific and mathematical principles, and Western drama, as well as the Olympic Games.

From the eighth century BC, the Greeks were organised into various independent city-states, known as poleis (singular polis), which spanned the entire Mediterranean region and the Black Sea. Philip of Macedon united most of the Greek mainland in the fourth century BC, with his son Alexander the Great rapidly conquering much of the ancient world, spreading Greek culture and science from the eastern Mediterranean to India. Greece was annexed by Rome in the second century BC, becoming an integral part of the Roman Empire and its successor, the Byzantine Empire, wherein the Greek language and culture were dominant. The Greek Orthodox Church also shaped modern Greek identity and transmitted Greek traditions to the wider Orthodox World.[15] Falling under Ottoman dominion in the mid-15th century, the modern nation state of Greece emerged in 1830 following a war of independence. Greece's rich historical legacy is reflected by its 18 UNESCO World Heritage Sites, among the most in Europe and the world.[16]

Greece is a democratic and developed country with an advanced high-income economy, a high quality of life, and a very high standard of living. A founding member of the United Nations, Greece was the tenth member to join the European Communities (precursor to the European Union) and has been part of the Eurozone since 2001. It is also a member of numerous other international institutions, including the Council of Europe, the North Atlantic Treaty Organization (NATO), the Organisation for Economic Co-operation and Development (OECD), the World Trade Organization (WTO), the Organization for Security and Co-operation in Europe (OSCE), and the Organisation internationale de la Francophonie (OIF). Greece's unique cultural heritage, large tourism industry, prominent shipping sector and geostrategic importance[b] classify it as a middle power. It is the largest economy in the Balkans, where it is an important regional investor.

Athens Travel Guide: https://www.tripadvisor.com/Travel_Guide-g189400-Athens_Attica.html
Hotel: http://www.goldencoast.gr/en/
Wiki Travel Guide: wikitravel.org/en/athens
Currency Converter: www.xe.com