Beautiful in the world

Sydney Opera House: Sydney
The Sydney Opera House is one of the world's top tourist attractions and most recognizable buildings. This Australian landmark in Sydney is also known as one of the busiest performing arts venues in the world. To get to know the famous Opera House, you can take the hourlong guided Sydney Opera House Tour. Additional guided options are also available, including a comprehensive backstage tour of the venue. Afterward, stay for drinks or dinner harborside at one of the venue's indoor or outdoor restaurants.

Angkor Wat: Siem Reap, Cambodia
The ancient temples spread across Angkor Archaeological Park constitute one of Southeast Asia's most significant archaeological sites. This UNESCO World Heritage Site showcases the remains of the various capitals of the Khmer Empire in the ninth to 15th centuries, including the world's largest religious monument: the expansive Angkor Wat temple complex. To best understand Angkor Wat's history and its unique Khmer architecture, consider booking a guided tour – and, before leaving the ancient site, be sure to climb to the top of Angkor Wat for truly spectacular views. As you explore the rest of Angkor, the Banyon temple at Angkor Thom is also not to be missed.

Scala dei Turchi: Agrigento, Sicily
The name for this unusual terraced cliff of marl rock – which means "Stairs of the Turks" in English – is believed to derive from the marauding Ottoman pirates who used to shelter behind it. The bright white formation separates two beach coves in Agrigento and contrasts strikingly with the marine blue sea. To fully explore its ever-shifting steps without crowds, be sure to arrive early – and it's recommended to ascend the steps barefoot. Also, keep an eye out for young daredevils diving off its peak and other visitors enjoying a mud bath in the wet marl.

Yellowstone National Park: Wyoming, Montana and Idaho
Yellowstone enjoys a reputation as one of the best national parks in the U.S. for good reason. Sprawling across 2.2 million acres, this park boasts unique geothermal areas that include roughly half of the world's active geysers, as well as plenty of other geological marvels and diverse wildlife. You can enjoy this pristine wilderness in all seasons with activities ranging from skiing and backcountry camping to hiking and horseback riding – just prepare for summer crowds in popular areas.

Angkor Archaeological Park: Siem Reap, Cambodia
The 12th-century stone Hindu temple or wat, built by King Suryavarman II is the largest religious structure in the world. An architectural marvel surrounded by jungle and smaller shrines, Angkor Wat is laid out as a mandala, or plan of the universe, with courtyards on three levels. Famously covered in beautifully preserved Hindu carvings, you'll see Lord Vishnu, religious tales and thousands of dancing apsaras, alluring celestial maidens with their feet turned out. Skip the line on your trip and purchase a one-, three- or seven-day pass for the archaeological park in advance. To stay nearby, the Jaya House River Park receives rave reviews for its staff, riverside location, food and cleanliness.

Seljalandsfoss, Iceland
Seljalandsfoss, Iceland
One of the world’s most beautiful places, Seljalandsfoss in Iceland is a unique waterfall. It pours from a height of 60 meters with a footpath behind it but has a thin cascade. It is rare as it is the one waterfall that you can walk behind and see the mesmerizing beauty. Seljalandsfoss is a part of the Seljalands River, which originates in the volcano glacier named Eyjafjallajökull.