BirdsEye satellite imagery from Garmin will give you detailed images on your Garmin handheld devices. It only works with their expensive GPS line: Colorado, Dakota and Oregon. It’s also not a free service at $30. As someone that goes geocaching a lot having detailed maps will be very helpful. My only complaint is that you can only have the maps on one device. Even if everyone in your family has Colorado GPS units. It will be available in March and works with Mac and Windows.