query

// WP_Query arguments
$args = array(
	'post_type'              => array( 'sfwd-courses' ),
	'post_status'            => array( 'publish' ),
	'posts_per_page'         => '-1',
	'order'                  => 'DESC',
	'orderby'                => 'date',
	'tax_query'              => array(
		'relation' => 'AND',
		array(
			'taxonomy'         => 'ld_course_category',
			'field'            => 'slug',
		),
	),
);

// The Query
$viajes = new WP_Query( $args );

// The Loop
if ( $viajes->have_posts() ) {
	while ( $viajes->have_posts() ) {
		$viajes->the_post();
		// do something
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();