1. The Hohenzollern Bridge is known as a "Love Lock" bridge. Couples attach padlocks to its fence and throw keys into the Rhine as a symbol of their love.
2. The bridge, originally built between 1907 and 1911, was named after the House of Hohenzollern, Germany's former ruling dynasty.
3. It was rebuilt after WWII as a pedestrian and railway bridge, now it transports over 1200 trains daily, making it one of the busiest rail bridges in Germany.
4. The bridge features extravagant statue groups symbolizing the attributes of Prussia: science, mining, industry, and commerce.
5. Devotees visit the bridge during Cologne's annual carnival, parading their elaborate costumes and celebrating the region's festive traditions.

1. Entertainment: The Hohenzollern Bridge is not just a means of crossing the Rhine River, it's also a popular spot for lovers to place a 'love lock' on the bridge's fence and then throw the key into the river as a symbol of unending love. Make sure to carry a padlock so you can partake in this tradition.

2. Money-saving: It's free to walk across the Hohenzollern Bridge, providing an affordable and romantic way to take in the beautiful cityscape. While there, do remember to check different souvenir shops before buying the locks, as prices can vary.

3. Popular Spots: The Cathedral (Kolner Dom), situated near the bridge, is one of the major draws of the city. Plan your visit to the bridge in a way that also includes this UNESCO World Heritage Site, and use your time efficiently while absorbing Cologne's richest historical architecture.

4. Dining: While in the area, try visiting the famous Früh am Dom, a traditional brewery and restaurant that offers authentic Kölsch beer and hearty Rhineland dishes which are within walking distance from the bridge.

5. Best Times to Visit: Cologne enjoys a maritime influenced climate, making anytime a good time to visit. However, the view is especially stunning during sunset or during the Cologne Light Festival, when the whole city is illuminated with lights. To avoid crowds, plan your visit early morning or late evening.