Puerto Princesa’s claim to fame goes way beyond its swanky beach resorts and dolphin-watching cruises. The UNESCO-listed Underground River wows visitors with its low-hanging stalagmites and stalactites, and a cave that—due to its sheer size and rock formations resembling religious figures—is likened to a cathedral.

Tagaytay secures its place on most Philippines itineraries with its location above Taal Volcano's active crater. Views of the crater lake and a refreshingly cool climate make the town an enticing destination—not to mention the famously unfinished People's Park in the Sky.

Metropolitan Manila encompasses six cities and 12 towns. Located on Manila Bay in the South China Sea, and bisected by the Pasig River, the capital of the Philippines is historic and modern, rich and poor. A popular sight is the walled area called Intramuros. The capital during Spanish colonization, Intramuros has retained old dungeons and gunpowder rooms but added art galleries and theaters. The city is filled with museums, shops, parks and churches, plus enough nightlife to last until dawn.

Baguio, perched high in the Cordillera Central Mountains, is a great place to escape the heat of the Philippine lowlands. Camp John Hay, originally built as a recreation area for U.S. soldiers, now is a full-fledged resort complete with a world-class golf course. Definitely stop at the city market, where you can buy almost anything (just be prepared to haggle).

Delectable dim sum, floating islands, and a one-of-a-kind skyline are just some of Hong Kong’s unique features. Get an eyeful of traditional Chinese architecture in Ngong Ping village, then take the tram to the tippity-top of Victoria Peak for unparalleled views. The rocks and gentle hills of Nan Lian Garden will bring you inner peace, as will a calming cup of tea in a Stanley café. Become one with everything at the Chi Lin Nunnery, a serene Buddhist complex.

Home to nearly nine million and powering an economy that exceeds both Hong Kong's and Thailand's, Osaka packs quite a punch. The confident, stylish city is a shopping hub, with fabulous restaurants and nightlife. It's an ideal base for exploring the Kansai region; Kyoto's World Heritage Sites, Nara's temple and Koya-san's eerie graves are within 90 minutes by train. Top city attractions include the aquarium, Osaka Castle, Universal Studios Japan and the futuristic Floating Garden Observatory.