• The Acropolis (Athens): No matter how many photographs you've seen, nothing can prepare you for watching the light change the colors of the marble buildings, still standing after thousands of years, from honey to rose to deep red to stark white. If the crowds get you down, think about how crowded the Acropolis was during religious festivals in antiquity.
  • Nemea (Peloponnese): This gem of a site has it all: a beautifully restored stadium, a handsome museum, even picnic tables with a view of the romantic Doric temple. Look for the three long-standing columns -- and several newly restored and re-erected ones. If you're lucky, you may see Nemea's archaeologists at work reconstructing and re-erecting more columns from the temple's north facade in their ambitious restoration project.
  • Olympia (Peloponnese) & Delphi (Central Greece): Try to visit both Olympia, where the Olympic Games began, and Delphi, home of the Delphic Oracle. That's the only way you'll be able to decide whether Olympia, with its massive temples and shady groves of trees, or Delphi, perched on mountain slopes overlooking olive trees and the sea, is the most beautiful ancient site in Greece.
  • Palace of Knossos (Crete): A seemingly unending maze of rooms and levels, stairways and corridors, in addition to frescoed walls -- this is the Minoan Palace of Knossos. It can be packed at peak hours, but it still exerts its power if you enter in the spirit of the labyrinth. King Minos ruled over the richest and most powerful of Minoan cities and, according to legend, his daughter Ariadne helped Theseus kill the Minotaur in the labyrinth and escape.
  • Delos (Cyclades): This tiny isle, just 3.2km (2 miles) offshore of Mykonos, was considered by the ancient Greeks to be both the geographical and the spiritual center of the Cyclades; many considered this the holiest sanctuary in all of Greece. The extensive remains here testify to the island's former splendor. The 3 hours allotted by excursion boats from Mykonos or Tinos are hardly sufficient to explore this vast archaeological treasure.
  • Vergina (Northern Greece): In the brilliantly designed museum here, you can peek into what may have been the tomb of Alexander the Great's father, Philip of Macedon. Nearby, more than 300 burial mounds stretch for miles across the Macedonian plain.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.