3 Best Sights in Edinburgh and the Lothians, Scotland

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.

Travel east along the flat fields from North Berwick, and the imposing silhouette of Tantallon Castle, a substantial, semiruined medieval fortress, comes dramatically into view. Standing on a headland with the sea on three sides, the red-sandstone walls are being chipped away by time and sea spray, with the earliest surviving stonework dating from the late 14th century. The fortress was besieged in 1529 by the cannons of King James V and again (more damagingly) during the civil war of 1651. Despite significant damage, much of the curtain wall of this former Douglas stronghold survives and is now cared for by Historic Scotland. From the grounds you can see Bass Rock out to sea, which looks gray during winter but bright white in summer. Look through the telescope here and you'll see why.

An observation deck, exhibits, and films at this excellent family-friendly attraction provide a captivating introduction to the world of the gannets and puffins that nest on the Firth of Forth islands. Live interactive cameras let you take an even closer look at the bird colonies and marine mammals. Kids will enjoy the "Flyway Tunnel," a 3-D multimedia exhibit that simulates walking through an underwater passage, learning all about local nesting birds and sea life along the way. There are plenty of family-focused activities, nature walks, and photography shows, as well as a great on-site café and gift shop.