This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

The most loyal of little dogs, or a Victorian era publicity stunt?

The final resting place of soldiers' loyal canine companions.

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A floating cat sanctuary on an Amsterdam canal.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

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

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

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

A massive art collective tries a new take on Brooklyn's DIY music scene—by making it fully legal.

Series of storm drains connected to a dark urban legend.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

A layered tribute to the work of mosaicist Isaiah Zagar.