Where manatees are the snowbird vacationers in these balmy Florida springs.

In this German city center, the streets have no names.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

In the summer of 1957, a massive architectural exhibition showed off the future of urban living in this German neighborhood.

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

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

A monument to the man who almost killed Hitler.

A restaurant and observation deck built in a unique broadcasting antenna.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A museum glorifying the life of Stalin, located in the city of his birth.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Underground monastery and fortress.

With over 10,000 lights, this engineering marvel lights up the city after dark.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

You'll find just about anything in this funky Tbilisi flea market.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

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

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.