Pompeii, Italy, is a mesmerizing time capsule that invites travelers to step back into the world of ancient Rome. Once a thriving city, Pompeii was abruptly buried under volcanic ash and pumice following the catastrophic eruption of Mount Vesuvius in 79 AD. This tragic event preserved the city in remarkable detail, allowing visitors today to walk the cobbled streets and witness a snapshot of Roman life, from grand villas and bathhouses to bakeries and amphitheaters.
Southeast Spain's seaport of Cartagena is a large naval base on the Mediterranean coast. The city was founded in 220 B.C. and boasts Roman ruins, mosaics and murals.
As a city located in a Baltic Sea archipelago, it's not surprising that Stockholm has 50 bridges and sightseeing boats moving people between its 14 islands. This contemporary and welcoming capital of Sweden is nonetheless easily navigable by foot. Every district here has a distinct flavor, from the sophisticated Östermalm to the bustling downtown energy of Norrmalm to the delightful Old Town.