A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A Hungarian pharmacy museum with a box full of mummy powder.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

A sulfuric martian landscape that looks far better than it smells.

One woman's lifelong collection is on display in this unassuming house on an Icelandic fjord.

This natural rock formation features seemingly unnatural vertical ridges that have been blamed on elves.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

A monument stands to the famous suffragist who penned the declaration for women's equal rights, including the right to vote.

An activist who committed her life to peace and women's suffrage.

Avoid gangster interaction while window-shopping.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A 200-year-old collection of medical paraphernalia in a historic house.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

A public fountain that spouts "health water" from a nearby spring.

The only museum with its curator—and her pets—buried inside.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.