This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

Willy Wonka would love this weird half-a-home.

This natural sea cave hides a small wonderland of natural turquoise beauty.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

An exploration of a small ethnic group’s heritage through their exquisite folk art.

Everything from miniature biblical scenes to life-sized statues are almond-based at this sweet and nutty gallery.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Electrical curiosity museum housed in an old transformer station.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Budapest's Communist-era statues, banished to the suburbs.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

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

Abandoned since 1998, this train station has become an oasis for urban explorers.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.