Beppu boasts the largest volume of hot water and number of hot spring sources in Japan. The city is divided into eight distinct hot spring areas.

Speyer, located in the Rhineland-Palatinate region of Germany, is a city rich in history and culture. One of its most notable landmarks is the Speyer Cathedral, a UNESCO World Heritage Site and one of the largest Romanesque churches in the world.

Dominica, known as the “Nature Island of the Caribbean,” is a haven for eco-tourists and adventure seekers. Nestled between the French islands of Guadeloupe and Martinique, this lush island boasts a remarkable landscape of volcanic mountains, dense rainforests, and stunning waterfalls. Dominica’s most iconic natural wonder is the Boiling Lake, the second-largest hot spring in the world.

Located on the coast of Sinaloa, Mexico, Mazatlán is a trendy resort town with spectacular beaches and thrilling nightlife. Centro Histórico (Old Town) and Plazuela Machado are replete with colorful, newly-restored neoclassical buildings.

Located on Ecuador's central coast, Manta is a port city frequented by many South American cruises. Manta is known for its delectable seafood and variety of pleasant beaches.