Chicago is a vibrant and exciting city with plenty of adventures awaiting a sightseeing visitor. Here are some of the top activities that blend sightseeing with adventure in terms of architecture and thrilling experiences:

• Architecture Boat Tour: Chicago is famous for its stunning architecture, and one of the best ways to see it is from the water. Take a boat tour along the Chicago River to learn about the city's history and see some of its most iconic buildings, including the Willis Tower (formerly known as the Sears Tower), the John Hancock Center, and the Wrigley Building.

• Skydeck Chicago: For a thrill-seeking adventure, head to the Skydeck Chicago on the 103rd floor of the Willis Tower. Walk out onto The Ledge, a glass balcony that extends four feet outside the building, and look down at the city from 1,353 feet in the air.

• Navy Pier: Navy Pier is a popular destination for both locals and tourists, offering a variety of entertainment options. Take a ride on the Ferris wheel for stunning views of Lake Michigan and the city skyline, or try the high-flying thrill ride, the Centennial Wheel. You can also visit the Chicago Children's Museum or catch a show at the IMAX theater.

• Millennium Park: Millennium Park is a must-see attraction in Chicago, with its famous Cloud Gate sculpture (affectionately known as "The Bean") and the Jay Pritzker Pavilion, an outdoor concert venue. During the summer, you can catch free concerts and events at the park, or enjoy ice skating in the winter.

• Chicago Helicopter Experience: For a truly unique way to see the city, take a helicopter tour with Chicago Helicopter Experience. Soar above the skyline and get an aerial view of famous landmarks like Soldier Field, the Shedd Aquarium, and the Museum of Science and Industry.

• Kayaking on the Chicago River: Get a different perspective on the city by kayaking along the Chicago River. You can rent a kayak and paddle past some of the city's most iconic buildings while enjoying the scenic views