If it wasn't for Paris, Ghent would be medieval Europe's largest city. Steeped in history both rebellious and industrious, it sits at the junction of the Leie and Scheldt rivers and was once the site of armed battles by its townsfolk, who raged against heavy taxes and restricted civil liberties.

Castries, St. Lucia's capital and a busy port city, is an idyllic Caribbean wonderland. Tourists will find craft and fruit markets, photo-ready murals and a general cozy charm here. One must-do activity is getting to the top Morne Fortune (Hill of Good Luck) to drink in the lovely panoramic views. Be sure to visit the museum at Derek Walcott Square, and soak up the sun on Vigie Beach!

Stromboli is a small volcanic island in the Tyrrhenian Sea, just off the north coast of Sicily. Referred to by some as the "Lighthouse of the Mediterranean," Stromboli is in a constant state of mild volcanic activity, so don't venture out on a hike without an experienced guide.

Marseilles is an enticing port city known for its delectable seafood, breathtaking views of the Mediterranean, and diverse melting pot of cultures.

Beaches, margaritas and relaxed vibes are all part of visiting the island city of Key West, where summer never ends.