3 days in Frankfurt Germany

What kind of things? Museums, churches, historical buildings, markets, Jewish History, parks?
There are a 1000 things you can see here and a 100 towns you could visit. Your post is a bit vague, so the more specific you get, the better answer we can give you.

I used to travel to Frankfurt frequently for work and whenever I was there on a Saturday I would enjoy visiting the Flea Market they hold along the Main River in the area around the museums. The city's zoo is also a fun way to spend an afternoon. A short train ride to Mainz will also allow you to visit their great Romanesque Dom, along with the Gutenberg Museum and the Marc Chagall windows at St Stephen's church.

Oh goodness gracious me.

There are so many super things to do. What sort of thing do you like? How are you traveling?

I have loads of favourites, but your go-to person is the lady on the spot Ms Jo. What she doesn't know about the area isn't worth knowing.

You could go on a walking tour of the old town, for starters.

I recommend taking the train to Fulda. You can find great info about this town. It has the oldest surviving church and the town is beautiful. It also has great cafes where cakes that are served have 100's of years old recipes . Enjoy and Happy traveling

This is my list of what to see in Frankfurt.
- The Roemer and the Roemerplatz, City Hall since 1405 and old town square
- Book Burning Memorial, site of the Nazi book burning
- Alte Nikolai Church, Gothic church built in 1290
- House Wertheim, the inner city's only original half-timbered house left at the end of WWII
- Eisener Steg, pedestrian bridge of the Main River, offering a great view of the skyline and the many museums lining the riverbanks, covered with "locks of love".
- St Bartholomew, better known as the Kaiserdom. An Imperial Church, site of 30 elections and 10 coronations of the Holy Roman Emperor
- Joerg Ratgeb's wall paintings in the Karmeliter Kloster (Carmelite Cloister), the largest religious wall paintings north of the Alps, painted in the early 1500's
-Stumble Stones (Stolper Steine), a unique way of commemorating the many victims who lost their lives under the Nazi regime
- Jewish Holocaust Memorial Wall, a very personal memorial that the city of Frankfurt has created, to honor the memory of the 12,000 Frankfurt Jewish Citizens who lost their lives during the Holocaust, including Anne, Margot and Edith Frank
- Medieval Jewish Cemetery, one of the oldest and largest Jewish cemeteries in Germany (1272-1828)
- Jewish Ghetto Wall, (Staufen Mauer) once part of the city's defensive walls built in 1180, it later became one of the walls that surrounded the Jewish Ghetto
- Klein Markt Halle (little market hall), this is a wonderful produce hall filled with fruits, vegetables, chocolates, pastries, cheeses, breads, meats, fish, and delicacies from around the world (closed on Sundays and holidays)
- Höchst, neighborhood in Frankfurt that is part of the Half-timbered Route in Germany. St. Justinus church, built in 850 and one of the oldest churches in Germany, Schloss and palace, moat, city walls, and St. Josephs church.
- Hauptwache, historic Frankfurt landmark
- The Bull and the Bear at the Frankfurt Stock Exchange
- The Thurn and Taxis Palace, reconstruction and a lovely example of 18th Century Baroque architecture
- Eschenheimer Turm, an original guard tower from the city's outer defensive wall, built in 1425
- Alte Oper, one of Europe's classic opera houses, once known as the most beautiful ruin in Germany
- The Goethe House, where Frankfurts' favorite son was born
- Deutsche Ordens Church (Teutonic Order of Knights) built in 1309
- Paulskirche, the location of Germany's very first democratically elected parliment in 1848
- Farmers Markets, Thurs. & Sat. at the Konstablerwache, Fri. by the Stock Exchange, Wed. & Sat. in Bornheim on the Berger Str., Tues. & Thur. small market on the Kaiser Str., Tues, Fri. & Sat. in Höchst, Tues. & Fri. Sachsenhausen Sudbahnhof, Fri. Nordend Friedberger Platz.

Multiple museums to visit for every interest: Film, Architecture, Historic, Archeology, Fine Art, Sculpture, Communication, Bible, Modern Art, Icon, Jewish Ghetto, Leather & Shoes, Anne Frank, or Applied Arts

Thank you so much!!!