Downtown (El Centro) is the actual backbone of Cancún. What it lacks in history, it makes up for being a true melting pot — an exciting mix of the old traditional Mexico and an ultra-modern urban sprawl. Avenida Tulum, the main street, passing through the heart of the city, is easy to reach by public transport. The street is lined with shops, cafés, bars, and restaurants. Be sure to stop by Parque de las Palapas, on the market square, where locals come to chat and watch the entertainment provided by various local groups. The lively atmosphere and the sound of Mexican music are infectious, and any worries will quickly be postponed to "mañana." Browse around the artisan stalls and try some of the local sweet delicacies or visit the "Hippie Market" around the corner. In the evenings, the place to be is Avenida Yaxchillan with its lively restaurants and bars, popular with locals and tourists alike.

The Grand Mosque of Kuwait is the nation's largest place of worship, a monumental structure capable of accommodating over 10,000 worshippers. Its striking design incorporates materials from around the world, including French stained glass, Italian marble and a central gold-plated dome. The mosque offers guided tours that provide insight into both its extravagant architecture, featuring the highest minaret in Kuwait, and Islamic culture. Visitors should note that appropriate attire, including provided abayas and headscarves for women, is required.

Featuring sharks, penguins, seals and over 2,000 other species of aquatic life, the aquarium is a must-see in Boston. Deep-sea whale-watching tours on the Atlantic Ocean can also be arranged from inside the Aquarium.

Containing over 23 million items, in the form of books, CDs, DVDs and many more, The Boston Public Library is an impressive building containing impressive collections. Take a tour or peruse the holdings of the nation's first public library, which also displays the works of famous artists and sculptors.