More than 5,000 contemporary and "historic" mustards from around the world.

"A hideous albatross in the Hudson River Valley."

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This private residence was the template for one of the most beloved television homes of all time.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

This cave holds a surprisingly colorful variety of geological oddities.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

An architect's childhood fantasy treehouse made real.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

While there are no actual snakes in the history of this crooked road, there may be a number of dead horses.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

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

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

Megachurch turned Catholic church comprised of 10,000 glass panes.

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

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

The only Bahá'í house of worship in North America and one of only a handful worldwide.

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