For those going through a life transition, a place to leave behind a piece of your former self.

This medieval church is the only one in the world that features all Marc Chagall stained-glass windows.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

This hulking behemoth is actually five interconnected towers built in the 1960s.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

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

This tower was constructed to commemorate the man who helped bring true democracy to the United Kingdom.

This magnificent church allows travelers along one of Germany's busiest roadways a chance to rest and reflect.

These Stolpersteine located in Spain honor Republican soldiers who perished at the hands of Nazis after the fall of France.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

The original place where water met land in the City by the Bay is outlined in brass.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

Each winter this underground cave forms a dazzling ice palace.

Visitors to the National Museum of Nepal can moon over a set of well-traveled flags.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

The people of Padua pledged to construct this church if the city was spared from destruction during World War I.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

Named for the biblical warrior, the largest castle in Israel actually dates to the Middle Ages.