Begin your adventure by exploring the Frankfurt City Center. Visit the Römer, a historical building with beautiful architecture. Walk around the Alte Oper and catch a show if possible. Spend some time at the beautiful Main Tower to see stunning views of the city from the observation deck.
Head out to Taunus for some adventure activities such as hiking, biking, and exploring the region's natural beauty. Drive to Wiesbaden for lunch at the Michel Hotel and spend some time at the Kochbrunnen, a natural spring in the heart of the city.
Explore the Rhine River Valley and take a scenic boat trip along the river. Visit the charming town of Rüdesheim am Rhein and tour the Burg Rheinstein castle. Take a break for lunch at a local restaurant such as Rhein Hotel.
Get your adrenaline pumping at the Kletterwald, an adventure park where you can climb, zip line, and rappel through the trees. Take a break for lunch at the park's restaurant, or visit nearby restaurants such as La Mer or My Sushi Bar.
Spend your last day exploring the Frankfurt Zoo, home to over 4500 animals across 540+ species. Next, visit the Palmengarten, a beautiful botanical garden featuring a variety of plant species from around the world.
If you have more time, consider visiting nearby towns such as Heidelberg, Bad Homburg, and Darmstadt. If you have less time, skip the Kletterwald and spend more time in Frankfurt or exploring Taunus. Keep in mind that some attractions may require advance reservations or have seasonal hours, so double-check before heading out.