Once known for smog, traffic and tacky architecture, Athens is a city reformed thanks to fortunes brought by the 2004 Summer Olympics. Spotless parks and streets, an ultra-modern subway, new freeways, an accessible airport and all signs in perfect English make the city easily negotiable. Meriting more than a stopover en route to the islands, sophisticated Athens sites include many pillars of Western history, from the Acropolis to the Temple of Olympian Zeus, as well as treasures in the National Archaeological Museum.

Ultramodern towers define Riyadh's skyline, hinting at the Saudi capital's sophisticated culture, shopping, and dining. Prayer times set the pace for life in one of the country's most conservative cities, and gleaming architecture blends with historic landmarks from the kingdom's earliest years.

In 1715, margrave Karl III Wilhelm decided he needed more space than he had in Durlach, so he moved his capital to Karlsruhe and had it designed in circular spokes around his new palace. Because of its unique radial shape, Karlsruhe is sometimes called the “fan city.” Home to Germany’s most important federal courts, the city accordingly teems with civil servants. Karlsruhe Schloss (castle) was badly damaged in World War II, but was rebuilt and is now home to the Badisches Landesmuseum.

Flanked by a trinity of natural beauties—one green salt lake, one pink salt lake, and the Mediterranean Sea—the salt-mining city of Torrevieja is a distinctive destination on the Costa Blanca that boasts its own microclimate, along with museums, waterparks, and vibrant nightlife.

Known as the safari capital of Africa, Nairobi is an energetic, modern city that serves as a fascinating introduction to both wildlife and nightlife. Music clubs pulse with life, shops and markets bustle, and a mélange of restaurants will tempt your palate in this former Maasai watering hole. Top sights include the Karen Blixen Museum, Giraffe Centre and the black rhinos of Nairobi National Park. The compact city center is safe to walk in and taxis make other areas accessible.

A gem of a city easily reached by rail from Liverpool. Small yet packed to the rafters with history, culture and stylish cafe/bar culture. At its heart, the historic black-and-white timbered "rows" provide a shopping experience like no other place on the planet.

Golden palaces, floating markets, majestic porcelain-laid spires…you've never seen a capital city quite like Bangkok. Visit Pratunam or Siam Square for premium shopping, then unwind in the European-style gardens of Dusit. Thon Buri is home to the awesome Wat Arun temple, and over in Phra Nakhon, you’ll find the Wat Pho temple of the Reclining Buddha. Savor mango sticky rice at a food stall before taking in the gilded splendor of the Grand Palace.

A visit to Pattaya is a wonderful way to explore the beaches along the Gulf of Thailand. Relaxed and family-friendly Jomtien Beach is a hot spot for watersports and seaside massages. The giant Buddha of Wat Khao Phra Bat keeps watch over the city, and the wooden Wang Boran Sanctuary of Truth pays homage to Buddhist and Hindu art and architecture. At night, tons of bars and strip clubs attract an adults-only crowd.

Thailand’s largest island is an international magnet for beach lovers and serious divers, who enthusiastically submerge themselves in the Andaman Sea. Blue lagoons and salmon sunsets make for a dream-like atmosphere, and indeed, a vacation here can feel a bit surreal. Watersports are the most popular activities, though once you’ve had enough sun there’s still plenty to explore at the island’s aquariums, gardens, and Buddhist temples.