The Didin tunnel, Deer Creek Park and stargazing.

The reserve "Deer Streams" is 12 thousand hectares of untouched nature of the Middle Urals. Karst formations, forest-steppe and taiga, rocky banks of the Sergi River - it is impossible to see everything in one day, but you will have time to see something.
In winter, the park's hiking trails are rolled up by snowmobiles, and the system of signs will not let you get lost. Entrance to the park costs 250 rubles (children under 18 years - free of charge). If you wish, you can specify the information you need by phone: 8 (904) 172-55-65. Bring a thermos with hot tea and biscuits to eat on the way.

After the walk you can have lunch in the cafe "Forest Cuisine": it serves more organized groups of tourists, but the administrators will not refuse individual travelers.
You can call +7(950)207-44-41 or +7(908)911-88-36 for all questions.

On the way, take a look at the Nizhneserginsky Local History Museum. Here you'll learn curious facts about the history of the city and the Nizhne-Serginsky ironworks. Museum is open Tuesday through Saturday from 9:00 to 17:00. Phone for communication - 8 (343-98) 28-5-94.

Turbaza "Chusovaya" - one of the oldest in the Urals: it was founded in 1934 in an amazingly beautiful place on the high bank of the river with the same name. At the base you can swim in the open heated year-round pool, visit the contact zoo, skate, play table tennis or chess. You can find out more about your visit on the above website.

You can have dinner here, too. The menu is based on a solid base: fried daily cabbage soup, Russian pike-perch, skoblyanka with mushrooms and other fragrant dishes. There is a separate menu with dishes to order and a complex menu. You can book a meal by phone 8 922-037-87-66.

As night falls, hurry to the Kourov Astronomical Observatory. Established in 1965, it is the easternmost observatory in Europe and the most important scientific centre.
Excursions are not entertaining and not romantic, but extremely informative. Tours are daytime (150 rubles) and evening (300 rubles), duration 1.5-2 hours. The program includes a story about the observatory, a lecture on astronomy with slides, visiting telescopes and admiring the stars (if the weather is clear).
Day excursions are held all year round, but in the evening - only from August 1 to May 15. The course of the excursion and the time of its beginning in many respects depends on weather.
You can sign up for the tour only by prior arrangement by phone +7 953 820 5163.

Tomorrow promises to be a busy day, you'll have to get up early - so it's better to sleep well.