Hanauma Bay is a marine nature reserve and one of Oahu’s most iconic snorkeling destinations. Glide through its crystal-clear waters to encounter shimmering schools of silver fish, vibrant parrotfish, and even curious sea turtles that might swim right up to you. As a protected marine-life conservation district, the bay is a haven for biodiversity, but its popularity also poses a challenge. The delicate ecosystem faces ongoing threats from the very visitors who come to admire its beauty, making responsible tourism essential for its preservation.

Military Museum of Colombia is run by the armed forces and aims to show you more than 200 years of the country's military history. You'll see uniforms, flags, weaponry, medals, aircraft, scaled-models of ships and some full-size vehicles. In the two courtyards you can see actual tanks, cannons and airplanes.

The Harold L. Lyon Arboretum is 200-acre of real nature rather than a cosmetically designed and landscaped garden. On the trails winding through this impressive scenery, you can find some of the most representative Hawaiian plants and trees, such as breadfruit and sugarcane, so do go here for a lovely and relaxing stroll.