Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

UNESCO-protected ancient burial ground.

A collection of art from Bulgaria's time as a communist state.

"Holy Wisdom" overlooks the city that became its namesake.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

This redwood is a historic landmark, a town’s namesake, and the dancing sideline symbol of Stanford University.

Rare collection of medieval books under lock and key.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

One of the largest numismatic collections in Europe fell victim to a huge theft.

Two thousand artifacts from around the world collected by one woman who loved to travel.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The Ranger’s House exhibits fine mementos collected by Sir Julius Werner during the course of his life, including this infamous pendant.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.