Christ's blood preserved in a Belgian town.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This Connecticut chapel is a starkly modern, and surprisingly colorful, architectural rebel.

An abandoned gun-funded 19th century utopia.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

After decades of neglect, a brutalist icon is getting new life as an eco-friendly hotel.

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The headquarters of the famous Yale society.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A popular European tradition makes its way to the states on one of America's most famous bridges.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Church featuring "high Victorian gothic" architecture.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Once a dumping spot, now a park with a kayak launch.

A decommissioned military complex that's now a modern industrial park.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.