Started as a kitchen garden, now the second largest botanical garden in the world.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A 140-year-old castle with underground caves hidden in San Francisco.

A walk through the historic city center, under the streets of Seattle.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

World's largest collection of serial killer artwork and other macabre exhibits.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A kaleidoscopic warehouse-maze of handmade neon signs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A humble homemade ride attracts visitors from around the globe to this small Midwestern town.

Astounding collection of coin-operated games and automata.

This "little gallery in the middle of nowhere" is housed in a 170-year-old horse barn in the Missouri Ozarks.

A modern-day wunderkammer dedicated to Indianapolis history, Afrofuturism, and musical vibrations.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

This mysterious hill seems to pull objects uphill.

An ever-evolving wall of graffiti art off East Liberty Street.

For books about travel, whether factual or fictional, the perfect antiquarian does exist.