A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Even Henry David Thoreau found this glacial pothole irresistible.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

This high-perched pachyderm marks the memory of not one, but two elephants gunned down in small New England towns.

This replica medieval European village in the Dominican Republic was built by a Hollywood set designer.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

The final resting place of Christopher Columbus - or possibly someone else.

Built in 1512, the oldest cathedral in the Americas.

The first official clock in North America, it kept time for the Spanish government of Santo Domingo.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

One car at a time please.

A bit of retro transportation flair preserved in the world's largest department store.

Two mermen, eternally spitting into each other's mouths.

This rare polygonal meeting house is rumored to be built in a circle so that the devil has nowhere to hide.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

Yo, Adrian!

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.

This small-town pizzeria won the Hollywood lottery.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.