Tulum may be one of Mexico's lesser-known areas but it's gorgeous clear blue waters and lush green trees are not to missed, not to mention the dramatic Mayan ruins.

TripAdvisor's sites not to miss in Tulum are: Cenotes Dos Ojos,
Mayan Ruins of Tulum and Playa Paraiso.

Cartagena sits right in the most northern corner of South America, on the Caribbean coast. The city is home to plenty of beautiful and colourful colonial stone houses and buildings and the old town is even a UNESCO World Heritage site.

TripAdvisor's sites not to miss in Cartagena are: Walled City of Cartagena, San Felipe de Barajas Castle and Plaza Santo Domingo. 

Porto is Portugal's second largest city and the birthplace of Port. It's a haven for wine fans all over the world and there are plenty of wine cellars to be visited and many wines to be tasted!

TripAdvisor's sites not to miss in Porto are: Ponte de D. Luis, Rio Douro and Zona Ribeirinha

Gatlinburg can be found on the border of the Great Smoky Mountain National Park. The city sits in the valley of a number of the mountains and is well known for the Ober Gatlinburg aerial tramway and Dollywood, a theme park owned by Dolly Parton.

The sites not to miss in Gatlinburg are: Ripley's Aquarium of the Smokies and Sugarlands Distilling Company.

Moscow may be best known for the Red Square but the Russian capital has far more to offer than this. Taking a tour of the city's Communist history or watching a show at the famous Bolshoi theatre are a just a few things to enjoy.

TripAdvisor says not to miss: St. Basil's Cathedral, Red Square (Krasnaya ploshchad) and Moscow Kremlin (Moskovsky Kreml). 

Home to two  piers, a pavilion and plenty of other attractions, this quirky city on the UK's south coast is a popular destination all year around with Brits and tourists alike. 

Don't miss these top sites: Brighton Pier, Days Inn Brownsville and Royal Pavilion.

New Delhi makes for a striking contrast to the old city, although both are home to a rich culture and history. British architect, Edwin Lutyens, was reponsible for much of the design and architecture found in New Delhi. The city is a fascinating combination of modern updates and ancient history.

Don't miss Swaminarayan Akshardham, Lodi Gardens and Humayun's Tomb.

Nestled in the heart of the Rockies, Banff is not just the resort town it may seem on first impression. The town is renowned for its perfect snow conditions but it also plays host to great restaurants, nightlife and plenty of attractions to bring you back in the summer when the snow has melted.

Be sure not to miss Bow Valley Parkway, Banff Gondola and Lake Minnewanka.

The Peruvian capital was founded in 1535 and is burried in history including a host of amazing Incan archaeological sites and a number of buildings dating back from Spanish colonial times and what's more, there's a beautiful beach on offer too!

TripAdvisor suggests Museo Larco and Parque de la Reserva should not be missed.

This World Heritage park sits between Brazil and Argentina and includes a stunning 270 waterfalls. The most famous is Devil's Throat, a combination of 14 waterfalls that create a constant rainbow.

Things not to be missed include: Cataratas do Iguacu, Iguacu National Park and the Itaipu Hydroelectric Dam.