
Explore Peterhof Palace
Peterhof Palace is a famous museum located in Saint Petersburg, Russia. It first opened in 1723 and is built in the classical architectural style. The building itself is utterly magnificent, featuring gold elements and even many fountains and gold statues around its exterior that you won't want to miss. The palace itself is built in response to France's famous Palace of Versailles. Many of the elements used throughout it even might remind you of Versailles if you've been there before! While the palace was initially built for Peter the Great in honor of him winning against a battle with Sweden, it has since turned into a popular museum filled with art, exhibits, and other historical artifacts.
You Should Know
The museum is a lot bigger than you might initially think. Be sure to take the time to grab a map when you first enter to save yourself time when exploring! 
Walk along Nyhavn
Nyhavn is arguably the most photographed place in all of Copenhagen, maybe even all of Denmark. This is for good reason because it's a waterfront area filled with colorful residences that look amazing in any photo. The buildings themselves are from the 17th and 18th centuries and still look just as beautiful today as they did back then. While the area only stretches on for about 1,500 feet, it's still worth visiting. The famous Danish writer, Hans Christian Andersen, even lived here for a time! Be on the lookout for his house.
You Should Know
One of the best ways to explore this area is to hop on one of the river cruises, which are relatively affordable and short. They're great for all ages! 
See the view from the Tallinn TV Tower
The Tallinn TV Tower is a top tourist attraction located in Tallinn, Estonia. It stands at approximately 1,030 feet tall and therefore provides a fantastic view of the city from above that you can't get elsewhere in the area! This is a great way to get a glance at just how beautiful the city is. Keep in mind that this is not necessarily the best for travelers who don't like heights. The structure was first built in the late 20th century and has two different elevators that you can take to get to the top viewing deck.
You Should Know
This is the tallest building in all of Estonia and the most elevated viewing platform in Northern Europe. 
Learn at the Anne Frank House
The Anne Frank House is a must-visit in Amsterdam, Netherlands. It is a museum wholly dedicated to Anne Frank, who penned the famous diary that many people read every year. The building is located right near the river and was founded in the mid-20th century. Keep in mind that visiting a museum such as this one can be quite heavy because of how saddening this part of history was. This is where Anne Frank's family hid out during World War II from the Nazis.
Best Time To Visit
This attraction is known for having an extremely long line just to get in. You'll want to visit as early as possible or even have your tickets booked ahead of time. Otherwise, you risk not being able to go inside at all.
Explore Tallinn Town Hall
Tallinn Town Hall is the city's town hall located right on Town Hall Square. It's a gorgeous 15th-century building that is built in the Gothic style of architecture. While it may look a little unassuming during the day, stop by at night to see the beautiful lights on the building's side all lit up, which accentuates the building's architecture. What makes Tallinn Town Hall, so exciting and unique is Northern Europe's oldest town hall. It's also the only one that is built in this style of architecture. While the building that stands today is from the 15th century, there has been a town hall here since the 13th century, according to historians.
You Should Know
Tours are available in the town hall, which is a great way to visit and explore it!
Marvel at the Sibelius Monument
The Sibelius Monument is an incredibly unique and exciting outdoor monument and art piece located in Helsinki, Finland, in the middle of a beautiful park. It's dedicated to Jean Sibelius, who was a popular composer from Finland. The monument was built by an architect named Eila Hiltunen in 1767. It is a bit abstract, but that's what makes it so beautiful. It's genuinely a fantastic monument to photograph no matter what angle you look at it from. When you visit, take the time to walk around the gorgeous Sibelius Park, a vast green space in the city right near the water.
You Should Know
The Sibelius Monument is one of Helsinki's most important monuments because he was such a beloved violinist.
Have a blast at Tivoli Gardens
If you are looking to spend a day out having fun with your family or partner, there is no better place to do it than at Tivoli Gardens. This is a 19th-century amusement park located right in downtown Copenhagen, Denmark. You honestly couldn't miss it if you tried because you'd hear the shrieks and screams of people having fun on the rides! The amusement park covers approximately 20 acres of land. What makes Tivoli Gardens so amazing and unique is that it's one of the oldest amusement parks globally that is still operating. The only more senior amusement park still operating is also located in Denmark!
You Should Know
Try to book tickets ahead of time and consider purchasing a ticket that allows you to skip lines to make the most out of your time here! 
Stroll through Vondelpark
Vondelpark is a gorgeous 120-acre park located right in the center of Amsterdam, Netherlands. It's truly an escape from the city and has tons of fun walking trails, green spaces, lakes, and more. If you want to escape city life, this is the place to go! There are many unique places to explore in Vondelpark, with the Alchemist Garden being one of the most popular spots. Nearby, other fun places to visit include De Pizza Bakkers, Rijksmuseum, and the Babassu Store & Spa if you want a relaxing afternoon.
You Should Know
Consider renting a bike to ride along Vondelpark or grab a picnic to eat here for a fun time.
Visit Trakai Island Castle
Trakai Island Castle is a museum located in Trakai, Lithuania. It's located right on Lake Galve and is surrounded by beautiful blue waters. The main (or at least, most fun) way to get to the island is by boat. This provides an excellent sight-seeing experience! The castle started construction in the 14th century but wasn't finished until 1430. Some renovations occurred after the primary owner, unfortunately, passed away, and his son took over construction. Don't forget your camera when you come because you'll want to take pictures of almost everything here. The museum itself looks like a fairytale castle!
You Should Know
Book your tickets at least 24 hours in advance to visit Trakai Island Castle.
Learn history at the Viking Museum
The Viking Museum, also referred to by some as the Viking Ship Museum, is located in Oslo, Norway. It's owned by the University of Oslo and is one of the best places to go in the whole city if you're looking to learn more about the country's history with Vikings. Inside, the most critical piece that the museum holds is the three Viking burial ships. Yes, they are ships dating back a few hundred years and aren't remakes! The three must-visit ships include Tune, Oseberg, and Gokstad. There are also other artifacts throughout that will only enrich your museum experience.
You Should Know
While the museum isn't huge, you'll still want to block off around 3 hours to explore it.
Spring and Fall - September to November and March to May - Shoulder Season
The shoulder season in this part of the world comprises both the spring and the fall seasons. The spring has average temperatures of around 50°F while the fall sees averages closer to 58°F. Of course, this depends on where in the Baltics your cruise stops at, so it can vary!
Summer - June to August - High Season
The summer is the most popular time of year to visit the Baltics because the weather is so great. The average temperature around this time is 70°F. However, there will be longer wait times at popular attractions, and you might even find that some attractions you wanted to visit are booked out very far in advance.
Winter - December to February - Low Season
The least amount of people visit in the winter due to how cold the temperature can get in the Baltics during this time! The average high temperature around this time is usually about 35°F. However, if you dress warm, this can truly be one of the most beautiful times to visit because of the snow and holiday markets.