While Porto Colom is a charming little fishing town, there isn't a great deal to see there - for sightseeing you're best off heading to the nearby town of Felanitx. The mediaeval monastery of Sant Salvador is one of the best-known attractions in the municipality - dating back to 1348, it stands on a high hill overlooking Felanitx, with some spectacular views over southwest Majorca. Visitors can also see a seven-metre statue of Christ at the summit. Felanitx is also home to the Castillo de Santueri, a hillside fortress built on the ruins of a Moorish fortification, which itself was probably founded on a Roman military camp.
Not far from Porto Colom are the Coves del Drach near Porto Cristo, which translates as "Dragon Caves" - and you can certainly imagine a mythical beast making its lair down here amid the stalagmites and underground lake! The tour of these spectacular caves ends with a short classical performance by four musicians on a boat.
While in Majorca, take the time to visit the island's "capital" Palma de Mallorca - with a seaside cathedral and magnificent Old City, there are plenty of sights to see here.