Time for #fridaygeotrivia

Name capital city pairs (and their countries) that are less than 100km by land (no tiny islands) from each other. For example Vienna, Austria and Bratislava, Slovakia

As always:
• Only one answer per toot
• You must include the hashtag #fridaygeotrivia and the emoji flag of relevant countries

Full rules/details: https://blog.opencagedata.com/post/geotrivia-september-2024