Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A giant gorilla made of used car tires used to sit sentinel over a Helsinki college campus.

A traveling Bronze Age sacrificial stone that was used to honor elves, fairies, and other woodland spirits.

The palace for King Gustav III was never completed, but the foundation remains tucked away in this city park.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

A tombstone on the grounds of the royal castle marks the burial site of a Swedish king's beloved dog.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Crooked windswept pines give this old forest an enchanted and magical look.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

Built after WWII, the observatory site for the University of Copenhagen exhibits once world-class instruments.

This quiet bird sanctuary on the Danish coast is home to something not usually found in a conservation area: hunters' cabins.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

Hans Christian Andersen for the postmodern world.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

The history and future of cannabis.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This former Soviet military base has over 10 original aircraft and an enormous amount of memorabilia on display.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.