Iwo Jima Monument & Museum
You have to stop and see the Iwo Jima Memorial and Museum. It's near the Marine Military Academy and the Harlingen Airport. Walk around the monument, and then stop in the museum and watch a video and take in all the museum artifacts. There's even a short good video on Youtube. Click here to check it out!
The only thing that they're pretty strict about is no pets allowed in their property. It would be a great way to walk your dog, but other than that it is a must see if you're in the area. They're open Monday to Saturday from 10 AM to 4 PM and Sunday from 12 PM – 4 PM.