The remains of this 2nd-century Roman temple are incorporated into a modern building.

Breathtaking and huge 430 year old maps of Italy.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

Christ's blood allegedly 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.

This historical swimming pool near Miami 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.