Main Tower is a 200-metre skyscraper with a public observation platform. Head up to the rooftop for panoramic views of Frankfurt and the surrounding region, especially beautiful as the sun sets over the city.

Even though Georgians are not the biggest fans of their Soviet heritage, this great example of Tbilisi 70s brutalism must not be missed. Built on steep slopes in Nutsubidze street, it is one of the quirkiest constructions you will ever see. The three apartment blocks are connected by a bridge that goes through them. From the sky bridge, you can also see a nice view of the residential parts of Tbilisi. Once you are up and walk through the bridge, turn right and take a walk down the winding streets and admire a Caucasian architectural know-how: semi-legal additions to residential blocks of all shapes, sizes and materials.

Over 2,400 km of prepared snowmobile trails await you around Idre, providing a fun way to explore the area's stunning natural surroundings. In particular, the Älvdalen's area offers two great areas for snowmobiling: the Nordic Area (www.nordicarea.se) in the south and the Snöskoter Område Norra Dalarna (www.sond.se) in the north. To drive a snowmobile here, you'll need a license that can be obtained at the tourist office, at gas stations and at some other local businesses. You'll also need to ask for map and information about the rules and regulations you need to respect. If you don't have a snowmobile of your own, there is a wide range of rental companies in the area, with the possibility to go on a guided tour. One of them is Idre Adventure.