Ride among a wide variety of landscape in southwestern Ireland, starting with the fertile lowlands along the Shannon estuary. As you fly northward, passing sandy beaches, you'll see the impressive Cliffs of Moher. One of Ireland's top visitor attractions, the cliffs stretch 702 feet (214 meters) skyward and sprawl 5 miles (8 kilometers) along the Atlantic Ocean. The Cliffs of Moher are both a UNESCO Geo Park and a European Union Special Protection Area (SPA) for birds, as they're home to one of Ireland's major colonies of cliff-nesting seabirds. They're also classified a European Union Refuge for Fauna [sources: Lonely Planet, Cliffs of Moher].
From here, cycle up to the Burren. A rather barren, rocky, limestone expanse, it's actually considered "fertile rock," because tufts of grass and other vegetation manage to sprout out from small, scattered pockets of earth. Wildflowers such as gentians and orchids also proliferate in May and June. The Burren's desolate landscape is a result of glaciation; it's considered one of the world's best examples of Glacio-Karst landscape [sources: Burren National Park, Lonely Planet]. Burren National Park is located in the Burren's southeastern side.