Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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

Breathtaking and huge 430 year old maps of Italy.

A marvel of Byzantine engineering under the streets of Istanbul.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The fairy tale castle of the "fairy-tale king."

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The celebrated eyesore created by starry-eyed sweethearts.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

Everything from a plane to your own two feet are needed to reach this jungle resort.

Peek through the gates at this oasis from the city, full of Old English charm.

Elevated freight railway turned wildly successful urban park.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".