All Attractions in United States Select search type Accommodation Attractions Information Centres keyword location searchsearch Reset Location searchsearch {"bg":"","mt":"","mr":"","mb":3,"ml":"","pt":"","pr":"","pb":"","pl":"","border":"","rounded":"","rounded_size":"","shadow":""} View: Grid 1 View: Grid 2 View: Grid 3 View: Grid 4 View: Grid 5 View: List Diamond Head State Monument No Reviews Favorite OPEN Daily 6am to 6pm Last entrance to hike the trail is at 4:30pm Small entry fee. CASH ONLY. Tip: Go in the early morning or late afternoon if you want to avoid potential crowds. Check out our diary post from April 2013 here Read more... Smithsonian National Zoological Park No Reviews Favorite Hours Grounds: 6 a.m.- 8 p.m. (last admittance 7 p.m.) Visitor Center: 9 a.m.- 5 p.m. Exhibit Buildings: 10 a.m.- 6 p.m. Concessions: 9 a.m.- 5 p.m. Shops: 9 a.m.- 5 p.m. Note: Winter hours begin in November. Read more...