A forgotten "city of water" underneath the famous Trevi district.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

Roman-era ships unearthed...

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

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

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Super-heavy Nazi architectural experiment.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

An abandoned World War II tank left to rust in the downland.

Hundreds of notes give thanks to the patron saint of lost causes.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Stockholm's last remaining paternoster elevator.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

Museum celebrating the achievements of the Soviet space program.

This German fountain of a legendary apple wine-loving drink thief will spit on you.

An ornate tomb pays tribute to one of the most influential and cherished military leaders in Vietnam's history.