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Some of the public swimming pools managed by the Cologne city council, notably Agrippabad, do have small Saunalandschaften too, all featuring a Damentag (ladies only day).
Cathedral
A UNESCO World Heritage site, this monumental cathedral took 632 years to complete, finally being consecrated in 1880. Cologne's Dom is the first thing you will notice when leaving through the main exit of the central station. If you don't see it, you've likely taken the back exit. If you are in good shape, you can climb the 509 stairs to the top of the south tower. The round trip takes about an hour and requires comfortable shoes, but the panoramic view is well worth the hike. Touring the cathedral is forbidden during Mass; to ensure the doors are open for visitors, check the liturgical calendar: koelner-dom.de.
St. Kunibert's Church
St. Kunibert is the youngest of Cologne’s 12 Romanesque churches, famous for the Kunibertuspütz. According to local legend, Cologne’s babies are born in this crypt well rather than being delivered by the stork. The church is a treasure trove of medieval art, housing the city's oldest stained-glass windows (c. 1230) and the golden shrines of Saint Kunibert and the Ewaldi brothers.
St. Severin' is the second tallest of Cologne's Romanesque churches (79 m), dedicated to the patron saint of rain who is said to protect the city from drought. Visitors can walk beneath the elevated 19th-century shrine to receive a "blessing from above." The church is a treasure trove for history buffs, housing the largest preserved medieval silk fabric in the world (4th–10th century) and a crypt built over ancient Roman burial sites.
St. Maria in Lyskirchen is the smallest of Cologne’s twelve Romanesque churches, famous for its remarkably well-preserved 13th-century ceiling frescoes, the only ones of their kind to survive largely intact in the city. Located near the Rhine, it has long been the traditional church of the river boatmen and houses the beautiful "Schiffermadonna" (Boatmen's Madonna), a late Gothic wooden statue from around 1420.
St. Andreas
St. Andreas Church is a notable example of the transition from Romanesque to Gothic architecture and contains a 14th-century crypt where the scholar Albertus Magnus is buried. The interior is characterized by a series of contemporary stained-glass windows by Markus Lüpertz and features significant medieval furnishings, including 15th-century choir stalls and the gilded Maccabee Shrine.
St. Aposteln
A Romanesque basilica featuring a cloverleaf-shaped choir and a 67-meter-high west tower. Sightseeing is only possible outside of service hours. Group tours must be arranged in advance via the parish office; information on public guided tours is available on their website.