A beautiful Greco-Roman structure houses a well once believed to have healing powers.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A decommissioned tube carriage within a London museum hosts a regular pop-up supper club.

This bookstore serves recipes from the cookbooks on sale.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

This synagogue is the only place of worship for New Delhi’s small Jewish community.

This hidden Sufi cemetery is a spiritual monument for India's third gender community.

Ancient traditions and surreal birdwatching come into sharp relief along one of the world's most polluted rivers.

Delhi's only female ruler is buried in this neglected, forgotten tomb.

Delhi's oldest Christian cemetery is also said to be one of the most haunted in the region.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

Golden Gate Park's historic collection of plants.

With the touch of a button, you can read a randomly selected short story.

Visible below the waves are memorials to the city's Gold Rush dead.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A museum befitting the city responsible for supplying the majority of the world's LSD.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

If James Bond bungee-jumped off the side of a 720-foot dam, would you do it too?

This ossuary is more than five centuries old and is heralded as one of the finest in Switzerland.

An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

A 22-million-year-old sandstone cave is a natural habitat for award-winning cheese.

This ancient stone necropolis is in danger of disappearing.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.