Ancient paintings known as the "Sistine Chapel of Cave Art."

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A monument to the man who almost killed Hitler.

This monumental work of art symbolizes the coming together of a previously divided city.

Once a path for Jewish funeral processions, this unassuming alleyway is rich in local lore.

This curious sculpture represents the perseverance needed to take to the skies.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

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

Brace yourself for the slowest, scariest, most spectacular drive, down the Drakensberg Escarpment.

This hidden garden boasts amazing views of Lyon.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

A former factory serves as a shrine to the industry that sustained Santorini for decades.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

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

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A slice of central Asia in the middle of Berlin.

“The oddest pub in South Africa,” inspired by a practical joke.