What to do before/after the YAPC?

Suggestions:

Sightseeing Frankfurt

Those who set out on a discovery tour of Frankfurt can easily reach many of the sites on foot or by bus and train. Many attractions are not very far from one another in the city centre. And with public transport, you can quickly reach further sights such as the Palm Garden and the Zoo. A city tour with the
nostalgic tram, the "Ebbelwei Express" is particularly popular. And culture lovers will find an impressive selection of renowned museums on both banks of the Main.

Some of the intresting things to see:

Römer

The Römer, a Frankfurt landmark, is among the most beautiful and oldest town halls. Its silhouette, with three gables and the famous balcony, is known throughout the world.

Ebbelwei Express

This colourful tram carriage, which takes you to the finest sights in Frankfurt, offers an original city
tour. Guests can enjoy the trip over a glass of cider.

Imperial Cathedral

Visible from far away and of exceptional historical significance: Saint Bartholomew?s Imperial
Cathedral is a Frankfurt landmark and the coronation site of German emperors.

Saal Lane

The numerous postmodern façades behind the Schirn bridge the gap between contemporary architecture
and the medieval buildings on the Römerberg.

And many more see

http://www.frankfurt.de/sixcms/detail.php?id=317578
http://www.frankfurt-tourismus.de/cms/tourismussuite/en/sightseeing_frankfurt_rhine_main/sights_travel_guide/historic_sights/
http://www.frankfurt-tourismus.de/cms/tourismussuite/en/sightseeing_frankfurt_rhine_main/sights_travel_guide/frankfurt_skyline/

City-Tours

Heidelberg

"A former residence of the Electorate of the Palatinate, Heidelberg is the location of the University of Heidelberg, well-known far beyond Germany borders. Heidelberg is a popular tourist destination due to its romantic and picturesque cityscape, including Heidelberg Castle and the baroque style Old Town." (https://en.wikipedia.org/wiki/Heidelberg)

http://www.tourism-heidelberg.com/

Cologne

"Cologne is a major cultural centre of the Rhineland and has a vibrant arts scene. Cologne is home to more than 30 museums and hundreds of galleries. Exhibitions range from local ancient Roman archeological sites to contemporary graphics and sculpture. The Cologne Trade Fair hosts a number of trade shows such as Art Cologne, imm Cologne, Gamescom and the Photokina."

http://www.cologne-tourism.com/