This guide does not list individual places yet.
The Dutch Mine Museum is in the former shaft of the Oranje Nassau I mine. Here you can visit to learn all about the Limburgish mining history. There is a large collection of mining tools. It is possible to do a guided tour of around 2-2½ hours which includes 2 movies.
Housed in the "Glaspaleis", a well-known and modernized glass building on the main market, this cultural institution usually has some exhibitions on display, and often free. As a multi-disciplinary cultural institution, it also hosts the city's main library, concerts, a music school and all kinds of workshops.
This museum is built to encase the ruins of a Roman bathhouse which still is an archaeological dig site. You can learn all about how Romans bathed in their time, and about how the city of Heerlen developed. The museum also shows findings of Roman digsites in and around Heerlen. In front of the museum, there's a monument highlighting the old Roman crossroads.
Oil mill
A protected national monument, a water mill dating from 1502, original for pressing oil. These days, there's a bakery and a sewing machine shop in the building, and corn is ground by volunteers.
This tower from the 12th century had throughout history several functions, living tower for nobels, a court and prison tower. You can visit the inside on a guided tour from the VVV Heerlen.
Observatory to watch the stars.