The Church of San Pietro is a beautiful Benedictine abbey, originally founded in the 10th century. The church has some fine 15th and 16th century architecture, a good collection of Renaissance art, including frescoes and paintings by Raphael, Vasari, Vassillacchi, Perugino and Parmigiano and possibly the best wooden choir (16th century) in Italy.

Fishing is popular year-round in Estes Park. Fishing licenses are required for fishers 16 and older and can be purchased at local sporting goods and hardware stores. Contact Colorado Parks & Wildlife for maps and information on fishing regulations.

Jumalon Butterfly Sanctuary is a large collection of moth and butterfly species, kept in a lush botanical garden. The artist J.N. Jumalon uses the discarded wings and other everyday objects to create the eye-catching mosaics on display in the attached gallery.

In the booklet 'Dagje Heusden' there are two self-guided city walks including a map of the fortress. The booklet gives you information about the history of the fortress and the historic buildings that you will pass along the way. The two routes can be walked independently. Duration: 1 - 1.5 hours. The 'Through The City' (Door de Stad) walk starts at the Visitor Centre, taking you past the historic Catharijnekerk, by national monuments and beautiful old buildings in the town, alongside windmills and over the towns ramparts. The second walk, 'Fortifications' (Vestingwerken) also starts at the Visitor Centre and goes along the bastions and fortifications, past the historic cannons, the windmills and the marinas. Every Sunday afternoon you have the option to go on a guided tour with a “City Guide”. The guide will tell you about the town’s history, the fortifications, about the restoration of the city and the striking buildings. The start is always at 2:30pm at the Visitor Centre at Pelsestraat 17 in Heusden, and takes around 75 minutes.