The onyx black sand of Reynisfjara is formed from volcanic activity in Iceland: when lava collides with the ocean, it rapidly cools and shatters into small fragments of basalt. With its enormous basalt stacks (features in Game of Thrones and once believed to be petrified trolls), roaring Atlantic waves and stunning vistas, Reynisfjara is widely considered to be the most beautiful example of Iceland’s black sand beaches. The sea stacks along the shore are home to thousands of nesting seabirds like puffins, fulmars and guillemots — a must-see for birdwatchers. A visit to Reynisfjara is included in most tours of southern Iceland. Driving here is a good option, too, since it's only about 180 km from Reykjavík.

This Anglesey Abbey Gardens & Lode Mill sit on 64 hectares of vast land where one can see and appreciate the simplicity of nature and its vibrant colours. Inside you can find a collection of amazing fine furnishings, books, paintings and even other fabulous objects like rare silver clocks.

The Blue Lagoon is without a doubt the most well-known geothermal spa in Iceland. The signature milky-blue water makes a stark contrast to the surrounding black lava fields and creeping grey moss. The spa is located in a lava field near Grindavík and is supplied by water used in the nearby Svartsengi geothermal power plant. The water temperature stays at 39°C year-round, snowfall or sunshine. Most visitors make the spa their first or last stop, since it's conveniently located only 15 minutes from the Keflavík International Airport (and around 30 minutes from the capital city). If you are buying a tour, it makes most sense to combine the spa visit with the Golden Circle day trip.

The extraordinary Old City of Bari largely consists of narrow and winding streets, making it a charming place to stroll around. You'll find all the important medieval monuments, such as the Swabian Castle and many churches, including the Cathedral of San Sabino and the Basilica of San Nicola, as well as plenty of bars and restaurants.