Olfactory delights in San Francisco's Botanical Gardens.

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

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

This shop specializes in oddities and Victorian-inspired wonders.

A psychedelic labyrinth on the San Francisco bay.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

A domino effect created with Britain’s iconic telephone boxes.

This sculpture is intended to reset a person’s creativity.

A magical place that lets you play in and explore the world of Studio Ghibli.

Infamous and now demolished panopticon prison built by its former inhabitants.

Strange masks and obscure costumes are housed in this old Madrid corrala.

A pair of gigantic baby heads greet passengers at Atocha Station.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

The unfinished final resting place of some of Spain's most prominent politicians.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Five million people are laid to rest here, more than the population of Madrid itself.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

This small museum tucked within a subway station holds pieces from Madrid's past.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.