The 10 Best Free Things to do in Cologne, North Rhine-Westphalia

This giant Gothic cathedral, which until its completion in 1880 had been under construction for over 500 years, is perhaps Germany's most famous religious structure and includes two huge towers that serve as the defining symbol of Cologne's skyline.

This famous Romanesque cathedral, re-opened in 1985 following extreme damage during World War II, takes second billing behind only the Dom as Cologne's most prominent religious structure.

One of Cologne's 12 churches built in Romenesque style, Saint Gereon's Basilica dates to the 11th century and has unique architectural features including a dome, an intricate floor mosaic of David and Goliath and the remains of Roman walls. Open Monday to Friday from 10 a.m.-6 p.m., Saturday from 10 a.m.-5:30 p.m. It is not possible to visit the church during Sunday Mass at 10 a.m. and 11:30 a.m.

This intimate church includes intricately designed wooden doors from the 11th century on its outside and wooden carvings depicting the life of Christ on its inside.

A promenade in the old part of Cologne around the river Rhein. You will find there many restaurants and place to relax. From there you can do a bout trip.

This urban cemetery offers an oasis of green and a glimpse into the city's storied history, art and personalities. Open from 8 a.m.-5 p.m. in the winter, with extended hours in summer and fall. For a detailed tour, you may hire a guide at your own expense.

Cacti and plant houses make up this garden, which dates from the 1800s, along the Rhine River. Gardens are open 8 a.m. until dusk daily. Plant houses are open October to March 10 a.m.-4 p.m., April to September 10 a.m.-6 p.m.

This bridge over the Rhine River can be crossed by foot or by train. Since 2008 padlocks have adorned a fence on the bridge, affixed by couples as a sign of love and commitment.