A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

Secret refuge and museum of the Duke of Florence.

The curios of pharmacist and collector Henry Wellcome.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

An unusual round church in London with a Templar past.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This coffee shop lies hidden beneath a historic church.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

These ornate arches show how the course of the River Thames has changed.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

The quarry was abandoned over 100 years ago, after a massive ammunition explosion ended in tragedy.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

One of the largest trees of its kind in California.

San Diego's most historic and haunted home.