On the first Saturday of June most Uppsala museums stay open between 20:00 and 24:00, many of them organising special tours and events for the occasion.
Uppsala Slott
This major Uppsala landmark is stocked with large halls, paintings, and older remnants of the 16th-century castle built by the Vasa dynasty as a royal residence and a military fortification. As the castle was damaged in the 1702 city fire, the current building is smaller than it was in the 17th century, but is nevertheless built in the same style. It is the official residence of the governor of Uppsala county, and houses several museums. Due to its location on the top of Uppsalaåsen the Castle area offer some of the best views of Uppsala.
Domkyrkan
Gothic cathedral, which took a century and a half (1272 - 1435) to build, in the is one of the focal points of Uppsala and it dominates the city skyline. It is simultaneously the largest church in the Nordic countries, the burial site of many Swedish royals, and the seat of the Church of Sweden. Here you can see relics of Eric the Holy and Saint Bridget, and in the far end of the cathedral you will find "Vasakoret" – the royal crypt of Gustav I Vasa, "father of the Swedish nation". The walls of the crypt are covered in national romantic frescoes depicting Vasa's reign and his war for Swedish independence. Other notable burials include the 17th-century polymath Olaus Rudbeck, the 18th-century botanist Carl Linnaeus, the 18th-century mystic Emanuel Swedenborg and the theologian, archbishop and Nobel peace prize laureate Nathan Söderblom. It shouldn't be missed, but given its towering size, how could you? Free English language guided tours are held at 12:30 on the first Saturday of every month and daily late Jun–late Aug, M–Sa 10:00 and 15:00, and Su 15:00.
Uppsala Old Cemetery
The largest cemetery in Uppsala is a beautiful place for a walk. Notable burials include the national romantic poet and historian Erik Gustaf Geijer; the poet Gustaf Fröding; artists Olof Thunman and Bruno Liljefors; Nobel laureates Kai Siegbahn, Arne Tiselius, Svante Arrhenius and the Nobel Peace Prize laureate Dag Hammarskjöld, who died under mysterious circumstances during his tenure as secretary general of the UN.
Church of Holy Trinity
King Erik "the Holy" was killed in battle in or by the church in 1160. The current church building was erected in the latter part of the 13th century, making it older than Uppsala Cathedral. The interior is decorated by Sweden's most famous medieval church painter, Albertus Pictor. Architecture buffs can compare its Roman architecture to the Gothic style of the cathedral.
The Museum of Medicinal History
A museum concerning health and sickness in body and mind throughout history. In the 19th and 20th centuries the area was used a psychiatric hospital called Ulleråker, and many of objects used at Ulleråker are exhibited at the museum.
Stones of Mora
The place where Swedish kings were elected from the 13th to the 15th centuries, comparable to the more famous Scottish Stone of Scone. The stones can be seen in a small inconspicuous hut by the road side.