Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

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

The last king of Poland was interred in this church nearly 200 years after his death.

The biggest exposition of dental equipement in Europe. And a Mummy.

A 20th-century picture show in 3-D.

This 13th century Gothic brick castle is the largest in the world by surface area.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

This hidden collection of everyday objects illustrates life within communist Poland.

A haunting deserted hotel is a favorite with artists and photographers.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

An institution that preserves the history of institutionalization.

This museum is dedicated to the most famous Irish writers in history.

The remains of a majestic house that was once stood in the crosshairs of the Irish Republican Army.

This Copper beech tree nestled on a nature reserve is host to a bevy of autographs from Irish literary icons.

Fluffy and friendly alpacas nestled against the border of the beautiful Connemara region.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

A restaurant with an extensive Irish whiskey bar also has several first editions of famous works by Irish authors.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.