Located in an old church, this brewery produces a different kind of holy water.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A Roman monument to their own civil engineering prowess.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

A sculpture serving as an homage to Pope John Paul II.

A Nesting Doll of Churches.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The Brutalist building harbors an unusual inverted dome that swoops down over its central sacred room.

Metro station with a claim to rock n' roll fame.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This doorless 20th-century elevator doesn't stop or slow down.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

World's largest bell sits on the grounds of the Kremlin in Moscow.

The California secessionist movement has its own foreign embassy, in Russia of all places.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.