Tucked between Jordan's sandstone cliffs in the southwestern desert, Petra was carved directly into rose-colored rock more than 2,000 years ago. Visitors approaching through the narrow gorge known as the Siq are rewarded with their first glimpse of Al-Khazneh, the Treasury, a towering facade that seems to appear from another world.

Astoria, Oregon is the state's oldest city. Located on the Columbia River near the Pacific Ocean, Astoria is rich in history, including fishing, canning and the Lewis and Clark Expedition.

An industrial center and the island's chief Caribbean port. Tourism, sugar refining, and distilling are important. Founded in the early 16th century, it is one of the oldest cities in the Americas.

Although Alpharetta is not a particularly big city now, experts predict that in about 25 years, Alpharetta will be the geographical center of metro Atlanta, as the area continues to expand North. After driving past many empty fields, or wooded areas, you might find it hard to believe that Alpharetta will really become such a major city. What you probably don't know is that much of Alpharetta's empty land is owned by some of the biggest names in the nation.

Graz, Austria's second-largest city, is a hidden gem that offers a perfect blend of history, culture, and modernity. Its well-preserved medieval old town, a UNESCO World Heritage Site, invites visitors to stroll through cobblestone streets lined with Renaissance courtyards and Baroque façades. At the heart of the city is the Schlossberg, a forested hill crowned by the iconic clock tower, Uhrturm.