I have three pokes in remote locations which are my staples:
1) At the entrance to a nature preserve at the corner of a busy road in the middle of nowhere
2) At the end of a hiking trail at a different nature preserve.
3) At a dinosaur statue towards the rear of a kids park that you have to pay to get in and that closes at dusk.
Remote gyms are the best - one of my favorite aspects of Pokemon Go is finding one of these to put a Pokemon into