A large artificial lake just north of Warsaw, Zegrzylnski offers an occasionally much-needed retreat from the bustling capital city atmosphere. Complete with beaches (Wild Beach, on the south end of the lake, is one of the most popular), water sport rentals, fishing boats, and over 350 km (217 miles) of biking paths, there are plenty of activities available to keep all you adventure seekers active and engaged. And if you're visiting during the summer months, don't miss the staged Viking battles at Rynia, one of the many small villages to explore along the waterfront.
Location:30 km (19 miles) north of Warsaw, Poland
Note:Be advised, Zegrzynski Lake won't win any awards for its solitude. When things get toasty in the capital, traffic to and from this bit of natural respite can be pretty intense. You can minimize the inconvenience by either planning your trip on a weekday or getting out bright and early before the rest of the Varsovians do. Good luck.