Scars of this building's past life as a violent prison still cover its walls.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

A sharp sculpture made of thousands of pieces of jagged glass.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

According to legend, this ancient column contains healing properties.

A small but charming botanical garden that contains many exotic plant species.

Building owners can take out tiles for free at this repository for historic building materials.

Elaborate tile work in this railway station tells the story of Portugal.

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

A hidden three-foot-wide house separates these two regal churches.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The stunning interior of this Gothic church is covered in ornate gold details.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

20-foot tall lamp mumbles Swedish to celebrate the holidays.

Swedish mice can dine at the Nuts of Life restaurant or take a date to the amousement park.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Swedish skyscraper with a 90° twist.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

This sublime architectural marvel is a rare example of an expressionist church.

Hans Christian Andersen for the postmodern world.

Remnants of cone-shaped fascist bomb shelters in Milan.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.