The paramount symbol of Athens, Greece, and all Western civilization is the Acropolis. Today the Acropolis citadel rises up in the heart of modern Athens, reminding visitors of the grandeur of ancient times.
The Acropolis is crowned by three temples dating from the 5th century BCE, including the famous Parthenon, originally made up of 58 columns supporting a roof and decorated by ornate pediments and a frieze.
The 2.5-kilometer walking path, known as the Archaeological Promenade, connects the Acropolis to Athens' major ancient attractions such as the Ancient Agora, the Roman Forum, Kerameikos, and the Temple of Olympian Zeus.  

The Meteora, one of Greece’s most popular tourist attractions, is a rare and unique geological phenomenon. It features a gigantic rock formation that is an amazing marvel of nature that is home to a remote monastery complex, 600 meters high. This compound houses six monasteries (of an original twenty-four), that appear to be “suspended in the air”, providing visitors with a breathtaking view of these holy sites.

Situated at the northwestern edge of the Plain of Thessaly in central Greece, these monasteries are UNESCO World Heritage sites. Visitors must climb stone steps carved into the ancient rocks to reach each monastery, providing amazing views and testimony to the wonders of ancient architecture.

Knossos, the largest Bronze Age archaeological site, located on the island of Crete, has been called Europe's oldest city. Knossos was inhabited for several thousand years, beginning with a Neolithic settlement sometime in the seventh century BCE. It covers about 150,000 square feet (14,000 square meters), the size of more than two football fields.

The site came to prominence in the early 20th century when it was excavated and restored by a team led by British archaeologist Arthur Evans. The restoration includes large parts of The Palace of the Minoans that provides its many visitors with an appreciation the grandeur and complexity of the structure.

Corfu, the northernmost island, of the Ionian islands is a cosmopolitan island, combining the charm of Venetian, British and French colonial influences. Corfu Town, the island's capital, is a UNESCO World Heritage site and features Renaissance, baroque and classical architecture as well as palaces, noble mansions, beautiful museums, and charming squares.

Some compelling Corfu attraction include numerous monuments from Medieval times, including the Old Fortress, the New Fortress, Liston Promenade and the Church of Saint Spyridon, protector of the island.  All in all, this small island is packed with historical attractions as well as contemporary appeal.  

There are also many beaches on Corfu, the most popular being the Paleokastritsa, on the west coast, about 25-kilometers from Corfu Town. This beach boasts a collection of deep, curving bays and pebbled beaches surrounded by huge green cliffs and many sea caves that can be visited by boat, all leading into the clear blue Ionian Sea.

The ancient city of Olympia, located in the valley of Peleoponnesus, was home of the Olympic Games, held every four years, beginning in 776 BCE. It houses the remains of all the sports structures erected for these Olympic Games. It also contains the highest concentration of some of the most important masterpieces from the ancient Greek world.

The Temple of the Olympian Zeus, the largest in Ancient Greece, originally featured 104 Corinthian columns of which only 15 remain standing today. The site also includes the ancient stadium, the gymnasium, the temples of Zeus and Hera, as well as the workshop of the ancient Greece sculptor Phidias.

Thessaloniki, located in the north, is Greece’s second largest city.

With a rich and vibrant history, Thessaloniki boasts many Byzantine churches and Ancient Greece treasures. But perhaps its claim to fame is that it is the gateway to Macedonia, with connections to Alexander the Great and his tutor Aristotle. It has two major universities that attract hundreds of students, giving it an eclectic and youthful vibe.

As the crossroads of European and Ottoman cultures, Thessaloniki contains many museums, among the most notable being, the  Archaeological Museum that houses a large collection of remains from Greek Macedonia and the Museum of Byzantine Culture that features artifacts from that period.

As far as historical sites, you won’t want to miss are the Arch of Galerius and Rotunda, as well as the Thessaloniki Citadel with its walls located in the upper city, famous for its beautiful sunset views.

Epidaurus, located in the Peloponnese region, is a UNESCO World Heritage Site. It features the well-preserved Ancient Theatre, constructed in the late 4th century BCE to host religious ceremonial events in honor of the god Asclepius. Known for its great symmetry and incredible acoustics, it can seat up to 14,000 people is still used today for antique Greek plays during the summer.

This site also includes the sanctuary of Asclepius, dedicated to the healing god; the Archaeological Museum and the Little Theatre.

Mystras is located about 10 kilometers from Sparta on the slopes of the Taygetus mountain. It was once one of the capitals and fortified cities of the Byzantine Empire and after years of decay was restored and designated as a UNESCO World Heritage.

Mystras features numerous historical sites, among them the Palace of Despot, the second most important palace of the Byzantine Empire. It is also home to the Cathedral of Agios, founded in 1292 AD, one of the most important churches of Mystras featuring a mixed architectural style combining 13th and 15th century styles.

It also features several other glorious churches and monasteries built in 13th and 14th centuries; and in the Archaeological Museum of Mystras, you can find exhibits and fragments dating back to the of the Byzantine era.

The North Aegean Islands, close to Turkey, includes many attractions and fantastic beaches. Comprised of several islands, the visitor can spend a few glorious days exploring these diverse sites.

The island of Chios features many medieval villages and magnificent beaches. Visitors can enjoy the beautiful paved alleys and oriental influence of Lesbos and its picture postcard villages.

Samos is known for its sandy beaches and small coves. The goddess Hera (wife of Zeus) and the famous mathematician Pythagoras were born on this island.

Icaria is home to Panigyria, a traditional Greek festival with dances and alcohol. Icaria’s beaches are considered to be the most beautiful of the Aegean Sea.

Lemnos is a breathtaking volcanic island with large beaches.

Delphi, a UNESCO World Heritage site, is built on the lower slopes of Mount Parnassus, 180 kilometers northwest of Athens.  Sacred in the ancient world, it served as a pilgrimage location for the worship of Apollo and for those seeking advice from the mythical Oracle.
 
Today it consists of the crumbling ruins of numerous temples, a theater, and stadium, dating back to ancient times. Only a few of the Doric columns remain standing from the Temple of Apollo but its imposing foundations conjure up the strong image of the Temple’s glory from ancient times.
 
The Delphi Archaeological Museum displays an impressive collection of finds from the site.