These fascinating tunnels were originally built during World War II in order to protect oil supplies from the Japanese bombings, though they were never used for that purpose. Today, two of the tunnels have been opened to the public and feature a collection of interesting photographs depicting life in Darwin during the war.

Nha Trang is lined with an uninterrupted, fine stretch of sand: the Tran Phu Beach. This is the beach most used by both locals and tourists, with infrastructure such as changing rooms and bathrooms available throughout at a fee. Although the beach works great for recreation, it's far from being the area's cleanest and most attractive. Alternatives worth exploring include the Bai Dai Beach, frequented by surfers. Bai Tien Beach (stones rather than sand), beaches on nearby islands (such as Bai Tru on Hon Tre, and Hon Tam Island beach). The beautiful Diep Son Beach is known for the spectacular underwater sand path leading to the island (only seen in full during low tide). If you're ready to travel further out, Jungle Beach is a great option but will take a couple of hours to reach. Surrounded by nature and fascinating flora and fauna, this beach is popular with both off-the-beaten-trackers and resort vacationers staying at the nearby Jungle Beach Resort.

The Fremont Street Experience is a highly successful attempt to draw the millions of visitors back to the downtown area. The domed-canopy 90 feet (27,5 meters) above the street was constructed along five city blocks, lined with some of the oldest casinos in Las Vegas. Every evening from sundown to midnight, the canopy becomes a giant screen showing high resolution images accompanied by concert-quality sound. At the top of each hour, visitors pour into the streets, looking skyward in anticipation of one of the six different shows lasting six to nine minutes.

Queens is one of New York’s most diverse boroughs, known for its mix of cultures, food, and art. Its neighborhoods each have their own flavor: in Astoria, Greek tavernas and bakeries line the streets, while Flushing offers some of the city’s best Asian restaurants. MoMA PS1 in Long Island City showcases cutting-edge contemporary art in an industrial setting, and nearby, the Noguchi Museum blends indoor and outdoor space with sculptures by Japanese-American artist Isamu Noguchi. History fans can visit the King Manor Museum in Jamaica, once home to Rufus King, a signer of the U.S. Constitution and early abolitionist. Citi Field, home of the Mets, and the Billie Jean King National Tennis Center, where the U.S. Open takes place, are also here. Both JFK and LaGuardia airports are in Queens, making it the first and last stop for many visitors.