Cold war icon and onetime "hole" in the iron curtain.

A fitting attraction for the corn capital of the world.

A beautiful geyser under environmental threat.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Northern Ireland's Brobdingnagian stepping stones.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.