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

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

An open-air "garden" of mural art that changes weekly.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

Mountain where Jesus was first tempted by the Devil.

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

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

One of Europe's largest supercomputers is housed inside of a disused chapel.

The humble beginnings of one of America’s greatest songsmiths.

An abandoned munitions storage facility with a rich architectural history.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.