A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

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

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

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

A cemetery housing wild west legends in South Dakota.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

27-room home built with the fortune of a sugar magnate.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

Half of a house.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

A startling, centuries-old subterranean marvel hides in plain sight.

This abandoned Greek island was the last active leper colony in Europe.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Did Inca children also slide down these smooth rocky slopes above Cusco?

The world's second-largest sundial, made entirely out of stone.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Beer lover's can-covered house.