The world's largest art museum, the Louvre is housed in a Medieval fortress-turned-castle so grand it's worth a tour itself. You walk through the 71-foot glass pyramid designed by I.M. Pei and added in 1989, and step into another world--one with carved ceilings, deep-set windows, and so many architectural details you could spend a week just admiring the rooms. The Mona Lisa is here, as well as the Venus de Milo and Winged Victory (the headless statue, circa 200 BC, discovered at Samothrace). The Louvre has seven different departments of paintings, prints, drawings, sculptures and antiquities. Don't miss the Egyptian collection, complete with creepy sarcophagi, or the collection of Greek ceramics, one of the largest in the world. (Please note the Louvre is closed on Tuesdays.)

Join a professional, licensed tour guide as you discover one of the most historical cities in Germany. Although nothing remains of the mortar and cement-block barrier between East and West Berlin, the Berlin Wall (built in 1961; destroyed in 1989) is still a main “site” in Berlin. View the well-known Brandenburg Gate, once a main gate hidden behind a 10-foot barrier and now known for celebratory dancing on its flat top during the reunification. Travel to the Checkpoint Charlie Museum, the most famous border crossing point. Checkpoint Charlie, once a wooden guard hut, was the most (in)famous border-crossing point between East and West Berlin from 1961 to 1989. All that remains of the checkpoint itself is a skeletal watchtower and a memorial of attempted escapees. Follow your guide as they lead you through the museum’s accounts of the most ingenious of these escape attempts— even a few by hot air balloon.

Follow the route of the Berlin Wall viewing numerous crosses and wreaths to remind us of the tragedies which occurred after the wall was built in 1961.

Spend time at the Brandenburg Gate, a triumphal arch, which stood in "no man's land" between East and West Berlin during the Cold War and became a symbol of a divided Germany. Enter the Room of Silence, built into one of the guardhouses, where visitors gather to meditate and reflect on Germany's past.

The Topography of Terror in Berlin is a museum and historical site that chronicles the crimes of the Nazi regime, particularly those committed by the Gestapo, SS, and Reich Security Main Office. It offers exhibitions, educational programs, and includes historical remnants like a section of the Berlin Wall to provide a thorough understanding of this period.

Visit Sachsenhausen, one of the major Nazi concentration camps in Germany. Most of its prisoners arrived after the Crystal Night pogroms, when Nazis arrested over 30,000 Jews over the course of just a few days. From its construction in 1936 until its liberation by the Soviet army in 1945, this camp held more than 200,000 prisoners. The site now holds a museum, memorial hall, and cinema, which screens a film depicting the camp’s history.

Located on the line that once separated East and West Germany, this stirring museum was built in the shape of a warped Star of David and focuses on the realities of Jewish life in Germany, from ancient times up to the horrors of the Holocaust.

Seen as Germany’s “Little Hollywood” from 1921 through WWII, Potsdam was the dazzling city of Frederick the Great, with countless marble fountains, exotic pavilions and Baroque castles (mostly built in the name of Frederick and Prussia’s power). Among the parks are testaments of Frederick’s eclectic and sometimes odd tastes such as the parasol-toting Buddha on the roof of the Chinesisches Teehaus pavilion, Frederick’s “guest house."

Visit the Neues Palais, ordered by Frederick the Great, including the Palace, the Grotto, and the Theater.