A bibliophile's heaven that contains hundreds of bookstores, offering over a third of secondhand books for sale in Tokyo.

Unbeknownst to most passersby, this marble statue standing outside an office building is a genuine piece of second-century Rome.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This enchanting green space houses a labyrinth lined with toxic plants.

Gargantuan pots of slow-cooked lamb, noodles, and red wine feed everyone at a Mallorcan harvest festival.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Tragic reminders of the 1945 firebombing campaign over Tokyo still haunt this bridge.

An unexpected curiosity cabinet hidden within a department store in the Japan Post tower.

This quirky collection of furniture also happens to be a public art installation.

Curious onlookers have suspected this strange structure is a secret government base.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

This Roman amphitheatre was also the location of the first gladiator school.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Beautiful views and Roman-style statues on the Italian coast.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The oldest volcanology research center in the world.

Pompeii's less famous neighbor is still revealing her secrets.