5 Lost Cities Of The World.

Petra, Jordan

1. Petra, Jordan

Country: Jordan

Civilization: the Nabataeans

Inhabited: sixth century B.C.

This rose-colored city carved from cliffs garnered fame in the West thanks to the 1980s blockbuster Indiana Jones and the Last Crusade.

Chichen Itza, Mexico

2. Chichen Itza, Mexico

Country: Mexico

Civilization: the Mayans

Inhabited: 600 to 1000 A.D.

Site of one of Mesoamerica's largest ball courts, this royal city is located near a massive underground cenote, or sinkhole, where the bodies of human sacrifices were dropped.

Derinkuyu Underground City

3. Derinkuyu Underground City, Turkey

Country: Turkey

Civilization: possibly the Phrygians

Inhabited: Approximately eighth century B.C.to 10th century A.D.

This underground network has more than 10 floors and room for up to 50,000 people, plus livestock. It is rumored to have been a hideout for early Christians escaping Roman persecution.

Machu Picchu, Peru

4. Machu Picchu, Peru

The results of the survey suggest that ease of learning the local language and adapting to the local culture are areas in which the U.S. fares well in as an expat destination--despite low scores in organizing finances and health care.

Memphis, Egypt

5. Memphis, Egypt

Country: Egypt

Civilization: the Ancient Egyptians

Inhabited: third millennium B.C. to seventh century A.D.

Located at the mouth of the Nile delta, Memphis thrived for centures as a center of trade, commerce, religion and royalty. Foreign invasions, including one by Alexander the Great, let to its demise.