Guided tours of Curacao

Casper Tours
Provide informative and fun tours covering east to west, lunch at a local restaurant for US$35 (cruise ships' tours from US$15) in a/c mini buses, English, Dutch and Spanish spoken.
Tel: 5610721, 4653010 
 
Taber Tours
Branch at airport and at other hotels and offer a variety of tours, usually in large Greyhound type buses.
Website: http://www.tabertours.com

Old City Tours
Offer a walking tour of Otrabanda area for a fee of around US$ 6 that includes a drink.
Tel: 4613554

Dornasol Tours
Offer tours in minibus with local guide, and full or half day eco-tours. Also have an English, Dutch, German and Spanish speaking staff. 
Tel: 8682735

You can also enjoy a unique and pleasant train journey through the island's capital of Willemstad. This journey takes you through the interesting and historic sights of the capital such as the floating market where Venezuelan merchants sell fresh fish and vegetables, the picturesque district of Scharloo and culminates in the Mikve Israel Synagogue, the oldest synagogue in use in the western hemisphere.
Tel: 4628833