Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Part bookstore, part café, and part forest.

A fairy tale castle in modern Rome.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A 16th-century horror show built in a lovely Italian garden.

Twelve natural mummies are displayed in the crypt of this former monastery school.

A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

Diego Rivera hid various people and symbols in his first large-scale mural project.

Thirty architectural gems from the 19th- and early 20th-century Tokyo were restored and relocated to this space.

Located in a veterinary school, this macabre exhibit displays the effects of animal diseases.

This museum boasts the ninth-largest collection of insects in North America.

A unique sculpture park that specializes in the huge and bizarre.

This stunning and ethereal mural symbolizes the beauty, unity, and diversity of humankind.

A series of abstract sculptures pop up from an otherworldly volcanic landscape.

A barbarous band of serpents guard the bases of these Aztec temples.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

66,000 pieces of art, donated by one of the world's richest men.

One of the world's largest collections of rare and magnificent bird specimens.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

An expansive book store, art gallery, and curio shop with wares ranging from tarot cards to novelty socks.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.