Isle of May
This small island in the middle of the Firth of Forth is home to many interesting sights, from the ruins of a medieval priory to a Gothic lighthouse to a wartime signal station. But it's the seabirds that really bring in the visitors. The Isle of May is the largest puffin colony on the east coast of Britain and is home to a quarter of a million birds nesting on the cliffs during late spring and early summer, as well as seals basking on the shore. To visit the island, you'll need to take a 12-seat RIB (rigid inflatable boat) across choppy waters, including a sail by Bass Rock—the world's largest colony of gannets. Tours start from the Scottish Seabird Centre and last four hours, including at least 2½ hours on the island. Book in advance online to avoid disappointment.
