WooCommerce: How To Get WooCommerce Page IDs

<?php
// Get The Page ID You Need
get_option( 'woocommerce_shop_page_id' ); 
get_option( 'woocommerce_cart_page_id' ); 
get_option( 'woocommerce_checkout_page_id' );
get_option( 'woocommerce_pay_page_id' ); 
get_option( 'woocommerce_thanks_page_id' ); 
get_option( 'woocommerce_myaccount_page_id' ); 
get_option( 'woocommerce_edit_address_page_id' ); 
get_option( 'woocommerce_view_order_page_id' ); 
get_option( 'woocommerce_terms_page_id' ); 

// An Example
function get_shop_featured_image() {
  if( is_shop() ) {
    $shop = get_option( 'woocommerce_shop_page_id' );
    if( has_post_thumbnail( $shop ) ) {
      echo get_the_post_thumbnail( $shop );
    }
  }
}

// In your template file place the following
// line to display the WooCommerce Shop featured image
// Now You're Cooking With Gas - BOOM!!
get_shop_featured_image(); 
?>