Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Relics from an era long gone, sit idle outside this Estonian museum.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

The world's oldest known salt mine.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The amazing wonder cabinets of a very rich Austrian archbishop.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

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.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Inside this church, a monument honors the first burial site of the famed philosopher.

Sweden's first electric elevator remains hidden within a fortress-like building.

Finally reunited, the three effigies now stand in a museum courtyard.

Sweden's oldest animated sign is still lighting up the skyline today.

A Japanese video game arcade hides in the back of a Swedish pool hall.

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

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.