Discover an extraordinary collection of tropical fruit and spice trees, rare Hawaiian plants, and hundreds of varieties of flowers at the 186-acre preserve known as Lawai Gardens, said to be the largest collection of rare and endangered plants in the world. Adjacent McBryde Garden, a royal home site of Queen Emma in the 1860s, is known for its formal gardens, a delicious kind of colonial decadence. The garden contains fountains, streams, waterfalls, and European statuary. Endangered green sea turtles can be seen here. (Their home in the sea was wiped out years ago by Hurricane Iniki.) The tours are fascinating for green thumbs and novices alike.