In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.

This bizarre hotel on historic Route 66 has been plagued by rumors of paranormal activity.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

The trials and tribulations of marking Poe's grave.

This old-fashioned carhop restaurant gave the world the waffle cone.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A giant donut stands as a popular symbol of Los Angeles iconography.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

This fountain was designed to honor the man who helped bring water to Barcelona.

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

Turntable anonymously received orphans, alms, and groceries.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

A contemporary art installation housed within a Gothic cathedral.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

An alchemist's "magic door" stands in the middle of a Roman park.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Ancient ruins hidden underneath a modern luxury hotel.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.