The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

The oldest house in Chicago certainly doesn't look the part and there are some who say it doesn't deserve its title either.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

This historic store hides a museum exhibiting a shoe-sizing x-ray machine and a pair of kicks that once belonged to the world's tallest man.

A science teacher's dream.

Cemetery featuring rare glass-fronted columbarium.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

One of two side-by-side totem pole parks dedicated to educating visitors on Tlingit history and culture.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

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

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

A derelict bit of transportation infrastructure hidden in the woods.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

A much-maligned monument to teetotalism.

Art deco landmark on the outskirts of Washington, D.C.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.