According to forum posts, some of the top must-see attractions in Zagreb include the Museum of Broken Relationships, Zagreb Cathedral, and the Upper Town. Travelers have also recommended visiting the Gric Tunnel and walking through Tkalciceva Street, which is known for its vibrant café culture.

For outdoor enthusiasts, Medvednica Mountain, accessible via cable car, offers scenic views and hiking opportunities. The Mirogoj Cemetery is another significant site, noted for its beautiful architecture and peaceful atmosphere. Additionally, the Dolac Market is a popular spot for experiencing local life and cuisine.

The Museum of Contemporary Art and the Mimara Museum are highlighted by many users as key cultural sites. The Museum of Naïve Art also garners interest for its unique collection. For a historical perspective, the Zagreb City Museum provides insights into the city's past.

Travelers interested in architecture might enjoy exploring the Green Horseshoe area, which includes several impressive buildings and the Botanical Gardens. Art Nouveau enthusiasts are advised to visit the Croatian State Archives and other notable buildings around the city.

According to forum posts, there are direct bus services from Zagreb Airport to the city centre. The Pleso Prijevoz shuttle bus can be used to reach the main bus station and costs 35 kn. Another bus, ZET bus 290, takes passengers to Kvaternikov Square, near the lower town, costing around 8 kn for two tickets, as it involves two zones.

Some travelers mentioned the availability of ride-sharing services like Uber and Bolt as convenient options from the airport to the city centre, with Bolt typically costing between 13€ and 15€. Traditional taxis are also available, although their costs were not detailed in the posts.

For those arriving late at night, the airport shuttle operates based on flight arrivals, ensuring transportation is available even for late incoming flights. This is particularly useful for passengers concerned about reaching the city centre during late hours.

According to forum posts, Hotel Dubrovnik is frequently recommended due to its central location near Ban Jelacic Square, making it ideal for easy access to local attractions. Hotel Jagerhorn is also favored for its proximity to the funicular leading to the upper town, offering a charming boutique experience.

Some travelers have suggested staying in apartments for a more localized experience. Apartments Lunima are highlighted for their excellent location and renovated interiors, despite the building's worn exterior. It's very close to Ban Jelacic Square, providing both convenience and a good price point.

For many users, the area around Ban Jelacic Square in lower town (Donji Grad) is considered the best place to stay due to its central location and accessibility to various sights and public transportation. This area is packed with options for dining and shopping, appealing to a wide range of travelers.

According to forum posts, various car rental companies operate in Zagreb, including Nova, Avis, Europcar, and local options like Avant Rent a Car. Some travelers mentioned Nova as a particularly reliable choice. Rental locations are conveniently found at Zagreb Airport and in downtown Zagreb, such as the Nova office downtown and Europcar at the Sheraton Zagreb.

For many users, car rental prices can vary significantly, especially during peak seasons like August. Prices can be as high as 500 EUR for a few days, which is considerably higher compared to other European cities. This spike in prices is mostly due to the high demand during peak tourist periods.

Some travelers have cautioned against renting cars from private owners as it is illegal. It's generally advised to book through recognized rental agencies to avoid additional unexpected charges at the time of car pickup, a situation some users have encountered when booking through third-party platforms.

According to forum posts, travelers recommend taking a bus from Zagreb to Plitvice Lakes, enjoying the park, and then continuing by bus to Split. This route offers scenic views, particularly impressive after exiting the Sveti Rok tunnel with glimpses of the coast and rugged terrain.

For those preferring to drive, some users suggest driving from Zagreb to Split via Sinj and Knin. This route is noted for passing through charming inland towns and offering insights into Croatia's history, including the scars of the war of independence. This drive is described as more scenic than the highway route but may be a bit slower.

Travelers have highlighted that driving in Croatia is generally easier and more relaxed compared to places like northern Italy, making it a good option for those accustomed to driving longer distances.

According to forum posts, Zagreb's Christmas markets have been highly praised, with some travelers mentioning that they were voted the best in Europe for several consecutive years and recently ranked 3rd best in the world.

Travelers have called out the vibrant atmosphere of the markets, highlighting the availability of concerts, food, and drinks spread across different city areas. The markets are known for their excellent ambiance and the opportunity to attend different events daily at various locations.

For families visiting with children, forum users have suggested attractions like ice parks and a special Christmas tram, making it a child-friendly destination during the holiday season.

Some users recommended visiting nearby attractions like the Ethnographic Museum and the Arts and Crafts Museum, which feature traditional exhibitions related to the season, enhancing the cultural experience of the Advent in Zagreb.