This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

20,000 pieces in a Frank Gehry-designed building.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

The first American department store, and home to the largest operating musical instrument in the world.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

Dive bar built out of the remains of a whaling ship.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

A new kind of theme park for adults off the Las Vegas Strip.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

An abandoned asylum where patients have been forgotten but their possessions remain.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

This abandoned subway station can still be seen on regular commuter trips.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.