The early 20th-century home features cutting-edge technology of the day, such as ammonia refrigeration and needle showers.

Once the beating heart of a small Maine town, this old mill was revitalized in part thanks to a starring role in 'Jumanji.'

Not one, but two of Frank Lloyd Wright's architectural masterpieces nestled on the same street.

DIY collection of eclectic holdings.

Continuing the tradition of the dime museum in style.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

This medieval village/restaurant perpetually celebrates the year 1376.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

A collection of biblical memorabilia.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A true Valhalla for cactus and succulent lovers.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A former plague hospital turned medical museum.

Amsterdam's former hotspot for public executions and dissections.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

This subterranean studio is filled with fascinating kinetic art.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.