Ancient catacombs form the foundation for this Rococo orgy of a church.

This hidden art nouveau gem was designed by an architect in search of a national style.

Time stands still at this serene burial ground in the center of Budapest.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

Thousands of flowers create enchanting pink tunnels over the city streets.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

Two gravestones clasp hands over the religious divide.

This collection of solar timekeepers includes the world's first digital sundial.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

A beautiful maze marks where three countries meet.