Don't get it twisted: This is the oldest pretzel bakery in the United States.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The oldest farmer's market in America is so ancient it was approved by the King of England.

Dr Barnes' $25 billion private collection of art and arboretum.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The world’s first penitentiary, meant to be humane, drove men insane.

Remnant of a largely forgotten struggle over resource scarcity.

A mural honoring two trailblazing Supreme Court Justices—Thurgood Marshall and Ruth Bader Ginsburg.

This museum honors an African-American renaissance man of the early 18th century.

One of America's oldest continuously operating hotels offers a blend of rich history and historic architecture in the heart of Annapolis.

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.

These vibrant row houses are a unique example of Baltimore kitsch.