Switzerland Mountains, Cheese and Chocolates Tour from Zurich. Venture to the Heidi-like region of eastern Switzerland on this full day guided coach tour from Zurich. Sample local cheese and chocolate, walk the streets of Appenzell and catch an aerial cable car over Swiss Alpine peaks for a comprehensive insight into this region. Even better, you'll travel in a personalized small group with a maximum of 16 people! Book and Save 10%: Switzerland Mountains, Cheese and Chocolates Tour from Zurich.

Viator Exclusive Combo: 'Game of Thrones' in Dubrovnik and Split. Follow in the footsteps of your favorite ‘Games of Thrones’ characters on this Croatia combo — it’s a Viator Exclusive that you won’t find anywhere else. When you join your expert guide in Split, discover the fictional city of Meereen while visiting the mountainside fortress of Klis and the UNESCO-listed Diocletian’s Palace. On another day, head to Dubrovnik and hear insider gossip about the series as you explore the UNESCO-listed Old Town, Lovrijenac Fortress and more. Book this Tour and Save 10%: Viator Exclusive Combo: 'Game of Thrones' in Dubrovnik and Split.

Viator Exclusive: Early Access to Sugar Loaf in Rio de Janeiro. Be among the first to stand at the top of Sugar Loaf Mountain without the hordes of visitors on this morning Rio de Janeiro tour — a Viator Exclusive that can't be booked anywhere else. Ascend the iconic site in a glass-enclosed cable car, and then snap unobstructed photos from the summit. No long lines and magnificent views during 1.5 hours of free time, plus the convenience of air-conditioned hotel transport, make this wallet-friendly tour a winner. Book and Save 10%: Viator Exclusive: Early Access to Sugar Loaf in Rio de Janeiro.

Viator Exclusive: Sewers of Paris Small-Group Tour. Explore the labyrinth of ancient passageways in subterranean Paris on this 1.5-hour tour of the city's sewers. Enjoy fine views over the Seine River from Pont de l’Alma, then step below street level into the sewer tunnels. On this Viator Exclusive tour, available nowhere else, listen as your guide shares tales from the sewers’ 200-year history; admire impressive feats of engineering; and learn of the flood defences and wastewater routes. Visit, too, the Paris Sewers and enjoy personal attention from your guide on this small-group tour, limited to 15 people. Book Now and Save 10%: Viator Exclusive: Sewers of Paris Small-Group Tour

Whale-Watching Cruise from Oahu with Optional Breakfast or Lunch. See humpback whales during their annual migration in the waters off Oahu on a whale-watching cruise from Waikiki. Enjoy great photo ops of the massive mammals, as well as views of Honolulu, Diamond Head and the Kahala Gold Coast. Plus, keep your eyes peeled for other marine life like Hawaiian spinner dolphins, porpoises and sea turtles. Select from a morning or midday cruise, and choose upgrade options like a breakfast or lunch buffet and round-trip transportation from your hotel. Book Now and Save 10%: Whale-Watching Cruise from Oahu with Optional Breakfast or Lunch.

Wild West Sunset Horseback Ride with Dinner. Leaving your morning free to explore Las Vegas, ride into the sunset on an afternoon horseback riding adventure. Discover lands once used by Indians and legendary cowboys as you spot big horn sheep, jack rabbits and road runners. Your all inclusive horseback adventure includes a cowboy BBQ dinner and roundtrip transportation from Las Vegas. Book and Save 10%: Wild West Sunset Horseback Ride with Dinner.