By Ingrid Melander ATHENS (Reuters) - Tourists exploring the antique sites of Athens on Monday said they weren't sufficiently worried about Greece's debt crisis to stock up on extra money, despite warnings by some travel groups that bank dispensing machines could shut. Some things are a bit run down," British tourist Marcus Larbalestier said. Failure to agree terms could force Athens to impose capital controls to staunch the recent outflow of billions of euros in recent days, though the Greek government has denied any such plans.