Kerak is a fortress town 75 miles (120km) from Amman, and contains one of the two major Crusader castles in the Kingdom. The castle, built to protect the approach to Jerusalem, stands on a craggy plateau 4,300ft above sea level. It was built in the early part of the 12th century and held for 50 years by the Crusaders until they were defeated by Salah al Din (Saladin) in 1189.

Colonia del Sacramento is where time lingers. Founded in 1680 by the Portuguese and later contested by the Spanish, the town’s past is etched into its cobblestone streets and weathered facades. The Barrio Histórico, a UNESCO World Heritage Site, is compact enough to walk in an afternoon yet layered with centuries of stories. Visitors can explore remnants of the original city walls and climb the iconic lighthouse for sweeping views of the Río de la Plata.

Cincinnati is one city that just can't sit still. Every year it's something new. An elegant downtown shopping mall, another floating restaurant, more mind bending amusement park rides, tougher championship golf courses, breathtaking new art exhibits. Experience Major Leaque excitement: The Reds and Bengals; powerhouse college hoops, hockey, throughbred racing, rowing, running, and tennis events offer year-round action. In the 1840's Cincinnati was heralded as the Paris of the new world.

This small yet charming city in Alaska's panhandle is a throwback to the gold rush era. Skagway is a well-preserved part of Klondike Gold Rush National Historical Park.

Aarhus, Denmark's second-largest city, offers a captivating blend of historical charm and modern vibrancy. Founded in the 8th century, Aarhus boasts a rich history that visitors can explore at the Old Town Museum, an open-air museum that recreates Danish life through the ages with its historical buildings and interactive exhibits. The city's medieval roots are also visible in the well-preserved Aarhus Cathedral.