For more than 170 years, this family-run bakery has been serving Berlin’s best Baumkuchen, or “tree cake.”

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

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

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

The most visited, and possibly most controversial, museum in Germany.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

One of downtown Berlin's last reminders of its Communist past.

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

Check the time in 145 countries at once with this East German relic.

Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

Three columns of volcanic rock shoot out of the ocean.

A tiny village church in dramatic surroundings.

One of the few places where you can visit a cenote and Maya ruins at the same time.

One of the last socialist halls still standing in the United States.

New fungal and bacterial species call this deadly lake home.

Multiple monuments to a grizzled old mutt that survived the landscape of Butte's treacherous Berkeley Pit.

Dr Barnes' $25 billion private collection of art and arboretum.

Utopia and nostalgia mingle at the site of Bronson Alcott's ill-fated agrarian commune.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

A classic carnival ride that was carved to be untouchable.