Fodor's Expert Review Marble Arch Caves Global Geopark

This geopark—one of Europe's finest show caves—has an interpretative center and trail walking routes in the surrounding mountainous uplands, including Cuilcagh, the highest point shared between counties Fermanagh and Cavan. The only UNESCO geopark in Northern Ireland, it's an ideal half-day underground activity, especially if it's a wet day in Fermanagh. Stalactites glisten above streams as you admire fragile mineral veils and cascades of calcite-coated walls and waterfalls. Guided boat tours, run by knowledgeable tour guides, last 75 minutes but may not be available after heavy rain. The show cave requires climbing 150 steps so it is not accessible for wheelchairs or strollers. For more information on the geological timescale of the caves and geopark ask for a free copy of the excellent color booklet Rockin' Around the Marble Arch Caves.

Bring walking shoes and a warm sweater. Tours begin at Marlbank Scenic Loop Centre, Florencecourt. There are frequent events that are suitable for children, such as fossil fun days and wildlife walks—check the website for details. There's also a restaurant and souvenir shop.