2 Best Sights in The Opera House and Royal Botanic Gardens, Sydney

More than 80 acres of sweeping green lawns, groves of indigenous and exotic trees, duck ponds, greenhouses, and some 45,124 types of plants—many of them in bloom—grace these gardens. The elegant property, which attracts strollers and botany enthusiasts from all over the country, is a far cry today from what it once was: a failed attempt by convicts of the First Fleet to establish a farm. Though their early attempts at agriculture were disastrous, the efforts of these first settlers are acknowledged in the Pioneer Garden, a sunken garden built in their memory. Among the many other featured gardens on the property are the Palm Grove—home to some of the oldest trees in Sydney—the Begonia Garden, and the Rare and Threatened Plants Garden. Not to be missed is a cutting from the famous Wollemi Pine, a plant thought to be extinct until it was discovered in a secluded gully in the Wollemi National Park in the Blue Mountains in 1994. Plants throughout the gardens have various blooming cycles, so no matter what time of year you visit, there are sure to be plenty of flowers. The gardens include striking sculptures and hundreds of species of birds. There are spectacular views over the harbor and the Opera House from the garden's seawall and two lovely restaurants are open for lunch and snacks.

For those who don't want to walk, the ChooChoo Express toylike train offers a 25-minute ride through the gardens, making four stops (A$10).

One of the most iconic and recognizable buildings in the world, and listed as a World Heritage site in 2007, the Sydney Opera House is a multivenue performing arts center and a unique architectural sight that wows more than 8 million visitors annually. While it sits pretty and worry-free today, this famous landmark had a long and troubled backstory. What should have taken Danish architect Joern Utzon four years and A$7 million to complete when commissioned in 1959, in fact took 15 years, A$102 million, and an additional team of Australian architects. Although you can access the building throughout the day and early evening, all you really get to see is the main foyer area, which is less than inspiring. To see the best of "the house" join one of the guided tours, which include the one-hour Sydney Opera House Tour, departing daily from the lower forecourt level between 9 and 5; and the two-hour backstage tour, departing daily at 7 am. Or book in to see many of the shows running in its five theaters.