This city, which started as a modest fishing village, now offers plenty of modern German charm. The extensive public transportation makes it a perfect home base for seeing nearby attractions such as Heidelberg. Mannheim is known for its many pretzel stands, so make sure you indulge in one of these delicious treats before you leave!

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.

Ceske Budejovice, the vibrant capital of the South Bohemian Region in the Czech Republic, is a city rich in history and culture. Its most famous landmark is the magnificent Black Tower, offering panoramic views of the city and the surrounding countryside. This 72-meter-tall Gothic tower, completed in the 16th century, is a prime example of the city's architectural heritage source.

Tenerife is the largest isle of the Canary Islands archipelago. Famous for its black and yellow sand beaches as well as Mt. Teide, the dormant volcano that looms over the island.

The capital of Crete, Heraklion is a Greek port city and a popular stop on Mediterranean and Greek cruises. The city is an historical marvel, replete with archaeological wonders and remnants of the region's past. Highlights include the Heraklion Archaeological Museum, the Rocca a Mare Fortress, the Venetian Loggia, and just past the city limits, the Palace of Knossos.