Heuscheuer (Hay Barn)

This hay barn located next to the Marstall was used to store hay for horses after it was destroyed in 1693. Prior to destruction, the initial purpose of this building was to defend the city against attackers, it was also known as the "Coat Tower" or the "Women's Tower". Present-day, this window-less building is utilized for university lectures.

Fireworks

Only three times a year (first week of June, July, and August), the town of Heidelberg holds a fire show at the castle. Crowds of people gather together along the Neckar to watch the castle illumination fireworks. There are many vendors selling all sorts of wurst and delicious snacks nearby! After the show, people are ready to hit the town for a night out!

Michaelskloster (St. Michael’s Monastery)

These ruins is all that is left of St. Michael's Monastery that was built in 1023 by Abbott Reginbald. This place became a pilgrimage after Reginbald's death in 1070. In 1503, the steeple collapsed, killing the last three monks. Ever since that incident, the monastery has been abandoned and left to ruins. Then in 1589, the university tore down the stones and tried to sell them, which turned out to be an unsuccessful attempt. Now it is a tourist attraction to see the remainders of the ruins.

Michaelskloster is located at the top of Heiligenberg, you can reach it by hiking up Philisophenweg, the site is located behind Thingstatte.

Abbott's grave, 1070

Heiliggeistkirche (Church of the Holy Spirit)

The Church of the Holy Spirit, constructed in 1344-1441, is the biggest regional Gothic church and a famous burial place for 55 Prince Electors. After years of changing religions, it is now a Protestant church.

"During the 30 Year´s War, however, the complete collection became the booty of Heidelberg´s conqueror, commander Tilly. Following orders of the Catholic Prince Elector Maximilian of Bavaria, the library was given to the Pope of Rome. Of the collection which once included more than 5000 books and 3524 manuscripts, only 885 manuscripts were returned to Heidelberg in 1816. During the following centuries, the church frequently changed its religious denomination and was used at different times by Catholics as well as Protestants. Even a partition barrier was erected in 1706 because both denominations wanted to hold service here. For 230 years, the barrier stayed in its place until it was removed in 1936. Today, the Church of the Holy Spirit is a Protestant Church."

http://www.heidelberg-marketing.de/content/tourism/sights/churches_monasteries/church_of_the_holy_spirit/index_eng.html

Schlossgarten (Castle Gardens)

The Castle Gardens, was developed in 1616 by Prince Elector Frederich V for his wife, Elizabeth. However, the garden was destroyed during the War of the Palatine Succession in 1693. Before the garden was destroyed, it was one of the biggest attractions back then; lined with beautiful flower beds and mazes, fountains, greenhouses with orange trees etc. You can still climb up to the castle today to check out the "garden" free of charge!

Karlsplatz (Karl’s Square)

 Karlsplatz, named after Grand Duke Karlfriedrich of Baden is a spacious square where the Prince Electors used to reside. A monastery existed here up until 1803, now it is just a big open space with an open view of the castle. 

Zum Ritter

Hotel zum Ritter st. George is one of the few houses still standing after the Wars of Succession. This Renaissance monument was erected in 1592 by Charles Belier and his wife. He created this ornate and lavish hotel to lure pedestrians in as they walk along the main street towards the castle during medieval times. It is one of the most well-known buildings in Heidelberg, definitely a main attraction when walking on Hauptstraße! This historic hotel is still well-preserved after countless renovations. Although a  new addition has been built behind the old hotel, you still feel like you are in the Renaissance period with a modern twist. There are two restaurants here, the Ritterstube and the Beiler. The Ritterstube is located in the old building, you can't help but notice the romantic ambience given off by the lavish carvings and ornate architecture that surrounds you when you enter- it resembles much like the king's parlor.