This house's itty bitty size means no humans allowed.

An architect transformed this abandoned cement factory into his castle-like workshop.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A temple to modernity, tucked away amid Barcelona's more well known museums.

A stately palace has been converted into the world's largest cannabis museum.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Prehistoric history as seen through the lens of an outsider artist.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The beloved home to all publications indie, erotic, and punky.

An avant garde art museum at the University of Chicago.

These abandoned grain silos and tunnels are an urban exploration dream.

All of Chicago's wood-paved streets are long gone but two alleys remain.

An abandoned relic of the city's failed experiment with below ground transit.

New England's tallest light house stands on an island with a history of cannibalism and death.

This tiny patch of arid sand sits in one of the greenest states in the United States.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

A speakeasy takes on Chicago's drinking culture.

This library and museum is dedicated to the life and literature of the Indianapolis native author.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.