ʻIolani Palace is the only official royal residence in the United States. The last king of Hawaii was David Kalakaua, who ruled the kingdom in the late nineteenth century. Hawaii became an American territory in 1900 and, almost 60 years later, was declared the 50th American state.

The United States naval base at Pearl Harbor was surprised by a Japanese military strike on the morning of December 7, 1941: all eight U.S. Navy battleships were damaged, more than 2,000 Americans lost their lives, and this very attack led to the American involvement in World War II. Today, a memorial reminds of those who died in the assault, while two museums and outdoor exhibits present the historical happenings and their backgrounds. The visitor centre in general also features exhibits and interpretive programs for other Pacific National Parks: Kalaupapa National Historical Park on the island of Molokai, American Memorial Park in Saipan, and War in the Pacific National Historical Park in Guam.

Cișmigiu Gardens, the oldest park in Bucharest designed by Carl Meyer in the 1850s, features a stunning rose garden in the north and a classic French garden on the west. Stroll along its tranquil paths or rent a boat to explore the largest lake, complete with its own island. This charming park offers a peaceful retreat, steeped in the city's history and elegance.