Famously misunderstood wonder of the ancient world

An enormous, inside-out glass globe built in 1935.

The ghostly remains of an accidental sea.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A one-of-a-kind collection of a unique medium.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

This small window display is dedicated to the noble carrot.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

Peek through a transparent pyramid and drink in the mountain made of books.

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.

A collection of abandoned typographic signs from Berlin and beyond.

A surreal museum of extraordinary industrial objects.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Week-long festival in the baby food capital of the world.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A bigger-than-life pun that has become a beacon of altruism.

This hands-on math museum believes in turning concepts into constructs.

The sun acts as a key that only fits this giant keyhole twice a year.