The large medieval center is one of Germany's cultural monuments included in the UNESCO World Heritage List. In the old part of the city is the beautiful Gothic cathedral "Petersdom".
8 most popular tourist attractions in Regensburg:
Regensburg Cathedral - St. Peter
The most beautiful Gothic church in Bavaria.
The stone bridge and the museum
The best views of Regensburg are from the 310-meter stone bridge (Steinerne Brücke), an impressive 12th-century structure that has crossed the Danube for more than 900 years.
Schottenkirche - the Scottish monastery
Built in 1150 by Irish monks, this former Benedictine monastery - originally called Jacobskirche or St. James Abbey - was eventually named after the many Scottish monks and missionaries who called it home from 1560 to 1860. Visit Highlights is the spectacle of the door - the Scottish front door - which has led to the church being declared one of the most important Romanesque ecclesiastical buildings in Germany.

Valhalla, Donaustaff
In Donaustauf, just 11 kilometers east of Regensburg, is the magnificent Walhalla, 
the famous German temple of glory. Built to resemble the Parthenon in Athens, 
it sits 96 meters above the Danube River and boasts spectacular 
views of the surrounding area. Built by Leo von Klenze from 1830-42 during 
the reign of Ludwig I, it was designed as a place to honor famous German speakers from history. Named after the Valhalla of Norse legend, this impressive neoclassical monument boasts over 65 plaques and 130 marble busts spanning some 2,000 years of history.
Liberation Hall, Kelheim 26 kilometers southwest of Regensburg 
high above the Danube on the Michaelsberg is the Liberation Hall (Befreiungshalle), 
a towering 59 meter high building built in 1863 in a style similar to that of ancient Rome. 
Built in the form of a large rotunda, this awe-inspiring structure recalls the German Wars 
of Liberation of 1813-15. 34 goddesses of victory can be seen inside, as well as important inscriptions from Ludwig I, and the back walls of the decoration are decorated with 18 statues that commemorate the 18 Germanic tribes.
The Old Corn Market and the Old Town Yard
The heart of the magnificent UNESCO World Heritage Old Town status Old Town centers around the Alter Kornmarkt or Old Cornmarket. Here you will see the oldest surviving part of the city, the Roman tower dating from the 2nd century, and the Herzoghof, the residence of the Bavarian rulers, first mentioned in 988 AD. On the south side of the square stands the Old Chapel (Alte Kapelle), dating from 1002 with a sumptuous Rococo interior, as well as the Baroque Carmelite Church from the 17th century.
Saint Blasius and Saint Emeram
St. Blasiu, an early Gothic Dominican church from the 13th century, is one of the largest and oldest surviving Gothic churches in Germany. Highlights include very fine frescoes and tombs, a late Gothic Virgin of Mercy, as well as a 15th-century desk in the same room where Saint Albertus Magnus, one of Europe's leading scholars, once taught. Another old ecclesiastical church is the former Benedictine monastery of Saint Emeram. Founded in the 7th century on the site of an old Roman building, the church has a romantic porch from 1170 and a fine door with three limestone reliefs from the 11th century. The church has a sumptuous Baroque interior, added in 1733, which contains a number of magnificent tombs from the 12th to 15th centuries, as well as three crypts.
Herzogspark
On the banks of the Danube, the four-star Herzogspark is a pleasant place to spend time. Highlights of this ancient public park - dating back to 1293 - include a botanical garden, the medieval Prebunturm (a tower built at the same time as the garden), and the remains of the city's former moat. Of particular interest to gardeners are the wonderful alpine garden with carnations, perzoles and rhododendrons, as well as a rose garden. Also of interest is the recently added Renaissance Garden, laid out in a general style for the period.