Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

The history and future of cannabis.

This small city park is best known for the nightly convergence of thousands of shrieking parakeets.

This statue pays homage to a group of kids's childhood companion who once called the park home.

A park with one large cat sculpture and 15 smaller ones, all painted by different Colombian artists.

Colombia's first concrete structure doubles as a replica of Versaille's Petit Trianon Belvedere and a symbol for development.

At the site of a graffiti artist's murder, fellow artists gather to pay homage.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

A celebration of Colombia’s premier contemporary artist.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

Colombia's biggest botanical garden contains plants from all across the country.

Storied crypts fill the most famous cemetery in Colombia.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

This tiny shop has been serving traditional tamales for more than 200 years.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

You've probably seen these distinctive orange-tiled columns on the big screen.

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.

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

Tiny memorials honor individual victims of the Holocaust.

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