Paris offers excellent public transportation services like metro, buses, and trains that are very cost-effective and convenient for visitors. The Paris Metro has an extensive network of lines that run throughout the city, connecting to all significant parts. There are also several taxi services available, but it can be an expensive option. An ideal option for tourists is to purchase a "Paris Visite Pass," which provides unlimited access to the city's public transport and discounts on museums, attractions, and restaurants. The pass cost varies according to the duration of your stay: €24.80 (1 day), €38.35 (2 days), €53.75 (3 days), €65.80 (4 days).
If you have more time in Paris, consider exploring the off-beat places and hidden gems scattered around the city. Some suggestions include the Catacombs, Sainte Chapelle, Montparnasse Tower, and Belleville. If you have a relatively shorter stay, consider cutting the Palace of Versailles and boat ride on Seine River for an optimized experience without compromising the most significant highlights of Paris. Also, remember to purchase the tickets in advance to skip the long queues and save your time. Lastly, don't forget to try the local delicacies and wines to complete your Parisian experience.