Title: Tourism in Greece
Content:  Tourism in Greece has been a key element of the economic activity in the country, and is one of the country's most important sectors. Greece has been a major tourist destination and attraction in Europe since the 1970s for its rich culture and history, which is reflected in large part by its 18 UNESCO World Heritage Sites, among the most in Europe and the world as well as for its long coastline, many islands, and beaches.  Greece attracted as many as 31.3 million visitors in 2019, up from 24 million in 2015, making Greece one of the most visited countries in Europe and the world, and contributing to approximately 25% to the nation's Gross Domestic Product. Greece is one of Europe's most popular LGBT tourist destinations. The religious tourism and pilgrimages, the ecotourism, the conference tourism, and the medical tourism are prominent, and initiatives are being made to promote the seasonal tourism as well. Some of the country's major tourist destinations include the capital city Athens, the islands of Santorini, Mykonos, Rhodes, Corfu and Crete, as well as the peninsula of Chalkidice.
Title: Tourism in Greece
Content:   There are numerous archaeological sites dotted all around Greece, many of which are popular with tourists. The Greek capital, Athens, has many archaeological sites, the most famous being the Acropolis, the Temple of Olympian Zeus, the Ancient Athenian cemetery of Kerameikos, the Philopappou Hill, the Tower of the Winds, Plato's Academy and the Ancient Agora. In the adjacent area of Attica are the Marathon tumuli, burying mounds in Marathon that house the ashes of the Athenian and Plataean hoplites that were killed in the homonymous battle. Findings from the area and from the battle of Marathon are preserved in the Archaeological Museum of Marathon nearby. In western Attica 
Title: Tourism in Greece
Content:  Greece has become in recent years a destination for ecotourism (especially hiking, canoeing, caving and climbing). The main destinations for skiing in Greece are Arachova, Kalavryta, Karpenisi and Metsovo. The Greek government is trying to bring more and more ecotourism to help and save the environment. So tourists and locals alike can have a clean environment.
Title: Tourism in Greece
Content:  Greece also is one of Europe's most popular LGBT tourist destinations, particularly its largest cities Athens and Thessaloniki and some of its islands such as Lesbos, Santorini, Skiathos and Mykonos. The latter is a well-known Gay-friendly destination with many establishments catering for the LGBT community. According to Lonely Planet, Skiathos and Mykonos are ranking among the most LGBT-friendly destinations in the world.
Title: Tourism in Greece
Content:  Some popular beach resorts include Crete, Rhodes, Kos, Corfu, Kefalonia, Zante and Skiathos attracting millions of foreign tourists every year.
Title: Holidays in Greece TV
Content:   Holidays in Greece TV is the satellite only network in Greece devoted exclusively to travel and tourism. Its aim is to promote the Greek tourism industry, which is one of the main industries in Greece along with shipping. Holidays in Greece TV launched in the fall of 2004. All areas of Greece are covered, as well as a look at various companies involved in the tourism industry. Programming includes documentaries, presentations, programmes covering specific topics such as nightlife, dining, SPA, recreational activities and more. The show provides information about cultural hotspots such as caves, monasteries, museums, traditional villages and ancient sites. Holidays in 
Title: Discovergreece.com
Content:  The portal provides information on more than 120 destinations in Greece including 30 Greek themes. Visitors can watch more than 60 videos and 3000 photographs from all over Greece. The website also provides a directory of events in Greece and a booking functionality for hotels and air tickets.
Title: Tourism in Greece
Content:  As a developed country highly dependent on tourism, Greece offers a wide variety of tourist facilities. Tourism infrastructure in Greece has been greatly improved since the 2004 Athens Olympic Games and continues to expand with a number of important projects particularly in areas of less mass-tourism.
Title: Tourism in Greece
Content:  Tourism in Greece traces its roots to ancient times. Cultural exchange took place between the Greek colonies of Magna Graeca and the young Roman Republic before Rome's rise to dominance of the Western Mediterranean. When Greece was annexed by the Roman Empire centuries later, the cultural exchange that started between the two civilizations triggered as a result a large number of Romans visiting the famous centers of Greek philosophy and science, such as Athens, Corinth and Thebes, partly because Greece had become a province of the Roman Empire and Greeks were granted Roman citizenship. Tourism in modern-day Greece started to flourish in the 1960s and 1970s, in what became known as mass tourism. During that time, large-scale construction projects for hotels and other such facilities were undertaken, and the country saw an increase in international tourists over the years. International events such as the 2004 Summer Olympic Games and the Eurovision Song Contest 2006, both held in Athens, greatly helped to boost tourism in the country, while large-scale nationally funded cultural infrastructure such as the New Acropolis Museum also contributed to the flow of tourists in the country. Thessaloniki was the European Youth capital in 2014.
Title: Greece
Content:  Macedonia, with 18% of the country's total tourist flow (amounting to 3.6 million tourists), followed by Attica with 2.6 million and the Peloponnese with 1.8 million. Northern Greece is the country's most-visited geographical region, with 6.5 million tourists, while Central Greece is second with 6.3 million. In 2010, Lonely Planet ranked Greece's northern and second-largest city of Thessaloniki as the world's fifth-best party town worldwide, comparable to other cities such as Dubai and Montreal. In 2011, Santorini was voted as "The World's Best Island" in Travel + Leisure. Its neighboring island Mykonos, came in fifth in the European category. There are 18 UNESCO World Heritage Sites in Greece, and Greece is ranked 16th in the world in terms of total sites. 14 further sites are on the tentative list, awaiting nomination.

Question: what activities are there to do in greece?
Answer: Ionian Islands.