Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

One of the world's heaviest musical instruments towers within a popular urban park.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Tiny memorials honor individual victims of the Holocaust.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

This ornate church has survived Nazi and Soviet occupation, including a short stint as a Soviet-era gymnasium and cinema.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

It houses the remains of a 17th-century version of the Titanic.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

The Guardian of Tallinn.

Finland's oldest astronomical observatory once played a crucial role in seafaring and timekeeping.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

This effigy of Peter the Great is greatly disproportionate.

Palace where the nearly un-killable Rasputin was murdered.

World's largest bell sits on the grounds of the Kremlin in Moscow.

One of the world's tallest statues is also one of its most hated.

Museum design and public transportation meet in this unique Russian train car.