Portland is home to the nation's largest wooded urban park—Forest Park. A short hike in, and you'll find it hard to believe that civilization is just steps away. With 70 miles of trails winding through the forest and offering views of the Willamette River, you'll often have nature all to yourself. However, you're also likely to run into locals jogging or walking their dogs—expect to be greeted with a friendly "hello." If you have the time, hike up to Pittock Mansion, a stunning French Renaissance-style château that once belonged to Henry Pittock, a prominent publisher and businessman. Today, the mansion serves as a historic house museum open to visitors, offering panoramic views of the city. Another popular destination within Forest Park is the so-called "Witch's Castle"—the moss-covered ruins of an abandoned stone house. Despite its eerie name, there’s no record of witchcraft here. However, legend has it that its original inhabitant was the first person in Oregon to be sentenced to execution for murder in 1859.

Khao Mai Kaew Cave is a majestic cave with a series of caverns and striking stalactites and stalagmites. Some sections in this vast cave create a pool where you can swim in. It's an adventure you'll never forget.

What better way to discover Funchal from high above than by cable car. Experience the green slopes, mountains, and even the amphitheatre of Monte and Funchal. The ride starts in the Old Town and sweeps you away towards the entrance to Monte Palace Tropical Garden. You can get a round trip ticket or choose to trek back down to enjoy the lush vegetation and gorgeous views of the city and the ocean on the way down.

With more than 100,000 exotic plant species from all over the world, black and white swans from Australia, and multiple ponds and lakes, Monte Palace Tropical Garden is one of the most impressive sights in Madeira. Make sure to stop by the Monte Palace Museum, which houses exhibitions featuring artefacts from a diverse range of international cultures as well as a mineral museum.