The ancient tomb acts as a calendar that keeps perfect time.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This blowhole is supposedly caused by a trapped monster.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

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

The celebrated eyesore created by starry-eyed sweethearts.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Baroque celebration of the end of the Great Plague of Vienna.

Lake within a lake.

Little island known for its massive beachfront "flowerpot" pillars.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

A fitting attraction for the corn capital of the world.

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

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

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

This rustic old building is said to be the most photographed barn in America.

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

An architect's childhood fantasy treehouse made real.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.