This is a great museum for maths aficionados. Captures incredible history of Arithmetic in general…read moreand its cryptographic and more sophisticated discrete maths in particular. Several exhibits and all for about three euros fee. You can spend many hours on the four floors with some original but some replicas of some of the rarest calculation machines ever built. For English users, you have enough in English in terms of supplementary cards. Must visit if you are in Bonn.

Mechanical calculators? I literally cranked out numbers in this place. The old-school calculators…read morehad hand cranks to drive the mechanism. It was a lot of fun to be able to play with some of the display calculators. Most of the calculators that you can play with come with quite detailed instructions in case you want to follow along and understand the mechanism. A beautiful space, reasonably well documented displays (even with English info), and just the right size to spend about two hours museum-ing. The focus is clearly calculating machines, but there's art as well as modern furniture on display. In some cases, the modern chairs slightly upstage the calculators. The floors are laid out such that the top floor contains the most ancient calculators and each floor down gets us closer to the present day. Worth a visit.

An enjoyable 2-day street festival stretching all the way from the Rhein up to the Beuel bahnhof!…read moreThe neighbourhood comes alive with locals and visitors enjoying the festivities starting at midday on Saturday. You'll find: * lots of food (from German sausages to Spanish paella to Asian noodles) * rides for the kids * chances to win prizes from local business * lots of neighbourhood clubs * exhibit of many classic and antique cars * several music stages * a car salesyard (yup - a car yard magically pops up on the banks of the Rhein!) Shops are also open on the Sunday from 12-5. Come along and check out the music & food, and discover the neighbourhood!

The Pützchens Markt is a huge fair that runs for just 5 days beginning on the Friday before the 2nd…read moreweekend in September. It brings together hundreds of stalls where you can play carnival games, enjoy varieties of food (German classics such as Bratwurst and Currywurst, crépes, noodles, waffles and the usual delicious sweets). You'll even find a Bavarian beer hall to help you prep for Oktoberfest. There's a tonne of fun to be had with the many rides as well, ranging from several "house of horrors" to dodgem cars to spinning rides, shooting rides, roller coasters and the carnival classic strap-people-in-then-throw-them-around-and-spin-up-in-the-air craziness. All-in-all a great time for everyone! Weekends are typically crowded, as is the final evening with the fireworks show at 10pm. If you come for the final day (Tuesday), you'll enjoy some great bargains at the dutch-style plant auctions (pick up a bunch of house plants for your entire apartment for just a handful of Euro!). Entrance is free - just pay per ride (typically €2 - €7,50).

Not a bad place, it has 4 slides, 2 of which are really rapid and for over 13's, but apart from the…read moreslides its not as good as aggua down the road in troisdorf.

From the owner: Während der Freibadsaison gelten gesonderte Öffnungszeitenread more