Gibraltar is a breeze for independent explorers. Head up the Rock for legendary...

https://touch-wiki.win/index.php/Are_the_World_War_II_Tunnels_in_Gibraltar_Worth_Visiting%3F

Gibraltar is a breeze for independent explorers. Head up the Rock for legendary views and meet the cheeky Barbary macaques. Afterward, wander Main Street to enjoy the British charm or grab a cold pint in Casemates Square. It is a fun, easy day.