The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Go through the looking glass in Tokyo's Wonderland-themed shop.

The largest greenhouse in the world is home to over one million types of plants.

A fascinating insight into daily life in the Eastern Bloc.

Once a black market electronics marketplace, now an otaku shopper's paradise.

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

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

400-year-old garden, restored to beauty.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Eighty million natural history specimens call this gargantuan museum home.

The longest hedge maze in the world.

The 10,000 Torii shrine.

This 700-year-old street food market features baby octopus and soy donuts.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Cat art as far as the eye can see.

Northern Ireland's Brobdingnagian stepping stones.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Museum preserving torture methods from the past.

360° views of the city plus five floors of optical illusions and hands-on science.