Walking tours are great options if you want to quickly orient yourself in a new city within 2–3 hours and meet a couple of fellow travellers. Your Viking guide will make sure you don't walk past any hidden gems and tell you stories of the Vikings, elves and modern-day Icelanders. Some tours might include lunch, others — booze. It's up to you how to stay warm.

Simply put, Iceland’s famous Golden Circle is a popular route between three of the island's most visited attractions. Usually done as a day trip, the route starts in Reykjavik and takes you south and inland, to the Þingvellir National Park. There you enter the Geyser geothermal area with the Strokkur Geyser being most eager of the bunch. Finally, you arrive at to the 32-metre tall Gullfoss waterfall in the canyon of the roaring Hvítá river. Many tour agents and travellers themselves like to make extra stops along the way to see a geothermal power plant or spend a few hours at one of the spas. You could rent a car and drive between the landmarks at your own speed. In summer, you could even use the long daylight hours to avoid the crowds that tend to come earlier in the day. If you can pick your own route, don't miss the Kerid Crater Lake — a scenic lake that occupies a 3,000 years old volcanic crater that you can easily reach on foot.

Back in the 1970s, Berlin was the home of the legendary David Bowie. Together with a specialist guide, you'll navigate the city on foot and by public transport, discovering the Berlin that inspired David Bowie's seminal Berlin Trilogy. You'll see Hansa Studios, where 'Heroes' and 'Low' were recorded. Stop by 155 Hauptstrasse, where Bowie and Iggy Pop lived and created together in 1977. This tour is an absolute must for all the fans of Ziggy Stardust.