16-Day Panama Canal - Ocean to Ocean

With its myriad hills and spectacular bay, San Francisco beguiles with natural beauty, vibrant neighborhoods, and contagious energy. From the hipster Mission District to the sassy Castro, from bustling Union Square to enduring Chinatown, this dynamic town thrives on variety. The city makes it wonderfully easy to tap into the good life, too: between San Francisco's hot arts scene, tempting boutiques, parks perfect for jogging or biking, and all those stellar locavore restaurants and cocktail bars, it's the ultimate destination for relaxed self-indulgence.

Puerto Vallarta is a resort town on Mexico’s Pacific coast, in Jalisco state. It is known for its beaches, water sports and nightlife scene. Its cobblestone center is home to the ornate Nuestra Señora de Guadalupe church, boutique shops and a range of restaurants and bars. El Malecón is a beachside promenade with contemporary sculptures, as well as bars, lounges and nightclubs.

Puerto Quetzal is Guatemala's largest Pacific Ocean port. It is important for both cargo traffic and as a stop-off point for cruise liners

This town is not on the Nicoya Peninsula, but rather on Costa Rica's mainland. It is best known as a cruise-ship port and launching pad for ferries heading southeast to the coast of the Nicoya Peninsula and for cruises sailing out on the Gulf of Nicoya. Puntarenas is also a major fishing port with a lively fish market. The town’s reputation suffers from the unimpressive parts you see from your car as you roll through town on the way to the ferry dock. But the town has a lot of character off the main drag, thanks to its illustrious past as an affluent port town and principal vacation spot for San José's wealthy, who arrived by train in the last century. Once the port was moved and roads opened to other beaches, Puntarenas's economy crashed, but it's making a comeback. Sitting on a narrow spit of sand—punta de arenas literally means "point of sand"—that protrudes into the Gulf of Nicoya, the town boasts a beautifully groomed, wide Blue Flag beach with views of the Nicoya Peninsula and spectacular sunsets, along with a public swimming pool, the San Lucas Beach Club, and a marine-life museum. Ticos arrive by bus and car to enjoy the beach and stroll the Paseo de los Turistas, a beachfront promenade lined with tree-shaded concrete benches and seafood restaurants. Crowds of locals, called porteños, cruise by on bicycles, the town’s most popular form of transport.

Cartagena's magnificent city walls and fortresses, now a UNESCO World Heritage Site, enclose a well-restored historic center (the Cuidad Amurallada, or walled city) with plazas, churches, museums, and shops that have made it a lively coastal vacation spot for South Americans and others. New hotels and restaurants make the walled city a desirable place to stay, and the formerly down-at-the-heels Getsemaní neighborhood attracts those seeking a bohemian buzz. The historic center is a small section of Cartagena; many hotels are in the Bocagrande district, an elongated peninsula where high-rise hotels overlook a long, gray-sand beach.When it was founded in 1533 by Spanish conquistador Pedro de Heredia, Cartagena was the only port on the South American mainland. Gold and silver looted from indigenous peoples passed through here en route to Spain and attracted pirates, including Sir Francis Drake, who in 1586 torched 200 buildings. Cartagena's walls protected the city's riches as well as the New World's most important African slave market.

Like many southeast Florida neighbors, Fort Lauderdale has long been revitalizing. In a state where gaudy tourist zones often stand aloof from workaday downtowns, Fort Lauderdale exhibits consistency at both ends of the 2-mile Las Olas corridor. The sparkling look results from upgrades both downtown and on the beachfront. Matching the downtown's innovative arts district, cafés, and boutiques is an equally inventive beach area, with hotels, cafés, and shops facing an undeveloped shoreline, and new resort-style hotels replacing faded icons of yesteryear. Despite wariness of pretentious overdevelopment, city leaders have allowed a striking number of glittering high-rises. Nostalgic locals and frequent visitors fret over the diminishing vision of sailboats bobbing in waters near downtown; however, Fort Lauderdale remains the yachting capital of the world, and the water toys don’t seem to be going anywhere.