Collection of scores of race cars from the 1900s to recent lovingly maintained and displayed.

Venture into the past with an unlisted exhibit hall featuring extinct birds.

These medicine cabinet staples are part of the museum's collection of everyday objects.

Alexander Hamilton’s creation caused quite a bit of controversy.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

Yo, Adrian!

Huge masonic hall in Philadelphia with lavishly themed rooms.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A rare view of a preserved Victorian science museum.

World's first "penitentiary," meant to be humane, drove men insane.

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

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

An underground wonderland in Iowa.

This tiny site in Iowa, part of a patchwork national wildlife refuge, is home to ancient flora and fauna.

A historic Maryland home that once belonged to a man who has been called "the most insignificant" U.S. Supreme Court justice.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The site of one of history's most indelible and horrific tragedies.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A monument commemorating the discoverer of radio astronomy.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.