On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The stoutest tree in the world.

The only castle in North America to ever house European sovereigns.

The tallest residential building in Africa is an unsettling Brutalist monolith.

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

The famous aviator's final resting place is a study in natural beauty.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

The world's second largest single-dish radio telescope, once used to contact E.T.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A downtown park built on top of unclaimed graves.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

A cemetery housing wild west legends in South Dakota.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

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

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

The first declared National Monument in the United States.

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