St Giles' Cathedral, the historic "Mother Kirk of Scotland", has been a focal point of religious and civic life on the Royal Mile since 1124. Its architecture is a tapestry of centuries, but the cathedral is most famous as the epicentre of the Scottish Reformation under firebrand minister John Knox. While the main body of the kirk is imposing, its greatest artistic treasure is the Thistle Chapel, an astonishingly detailed 1911 Gothic space housing Scotland's chivalric order. You can admire the beautiful stained-glass windows, see an original National Covenant, and find the bronze memorial to Robert Louis Stevenson. Just outside the west door, the Heart of Midlothian set into the cobbles is traditionally spat upon for luck. Free tours and audio guides help unravel the complex history within this essential Edinburgh landmark.

Croco Cun is an interactive zoo where visitors can get up close and personal with a variety of animals, including crocodiles, monkeys, snakes, and parrots.

Notre-Dame stands on Île de la Cité, often called the birthplace of Paris. The site has been sacred for thousands of years—long before the cathedral, there were Celtic worship spots, then Roman temples, followed by a Romanesque church. The Gothic cathedral we see today was completed in 1345 and became the heart of medieval Paris. Despite the fire in 2019 that damaged much of it, the main structure and most treasures survived. It stretches 128 metres long with two towers rising 69 metres high, still commanding the city’s skyline.