This municipal playground was co-created by the father of one of the most playful characters ever.

This remarkably simple jail went over a century without an escape.

The oldest continuously operating church in California.

A tree grown from astronaut seeds which were exposed to cosmic rays.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

The first safe in this California town had to hold all the gold.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

Instead of hoofing it up steep stairs, residents can hitch a ride on this private lift.

Tiki luxury on Nob Hill.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Retirement home where the actress who played the Wicked Witch of the West passed away.

A Yale University president wears full samurai garb in one of America’s oldest cemeteries.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

The Connecticut village named for its subterranean thunder.

One of America's first spies started out as a teacher in this little red one-room schoolhouse.

An extra-wide chair built to accommodate the former president's big behind.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

The cave where two British judges hid in exile after sentencing the king to death.

An abandoned gun-funded 19th century utopia.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.

137 graves holding New England's earliest residents.

Memorial to one of the most fatal fires in both circus and U.S. history.