The Palacio Real de Madrid, the official residence of the Spanish royal family in the city, is Europe's largest royal palace, boasting a whopping surface area of 135,000 square metres and a staggering 3,418 rooms. This architectural marvel is not only visually stunning, but also features spectacular outdoor gardens and exquisite frescoes, furnishings, and paintings within its walls. Originally constructed in 1764 as a replacement for the Alcázar castle, which had been destroyed by fire three decades earlier, this magnificent edifice is a must-see attraction for anyone visiting Madrid. Nearly the entire palace is open to the public, including the Armoury and Pharmacy.

Centennial Olympic Park was built for the 1996 Summer Olympics, but today, it’s a central gathering spot in downtown Atlanta. It’s a great place to take a break while exploring the city, with wide green spaces, walking paths, and the famous Fountain of Rings, where kids (and sometimes adults) cool off in the synchronized water jets. The park also hosts concerts and events throughout the year, so check the calendar if you’re in town. It’s also close to major attractions like the Georgia Aquarium and the World of Coca-Cola, making it an easy stop while sightseeing.

The National Botanical Conservatory of Brest contains around 1,700 endangered species of plants, which are all grown and cultivated in the reserve’s greenhouses. It is dedicated to the protection and growth of endangered species from around the world. The lush premises are open to visitors.