These abandoned cars (in the Ardennes Forest) once belonged to American service men. After the war, they were responsible for shipping their vehicles back. Many of them could not afford to do this, so the cars were brought to a clearing in the forest, parked and left there.
***this would be outside (maybe on the deck or near a tree). A bucket of water with floating votives.*** Like the idea of guests lighting a floating candle and making a wish for the bride and groom. Placing it in a small pond or boat filled with water.