An ancient capital city that dates back 3,000 years old and harbors many surprises.

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

Home to items never before seen by the public.

The world's most remote permanent settlement on an active volcano.

Final resting place of Antarctic explorer Ernest Shackleton.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

The hallucinogenic center of the ancient world.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Erotic art covers the walls of the largest ancient pleasure palace.

The walls and streets of the ancient city are peppered with penises.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

The world's first and only museum dedicated to dachshunds.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

When it comes to handsignals (and colonialism) rock always beats scissors.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The most accurate timepiece in the world.

Largest Roman Catholic church in North America.

The oldest continuously operating fish market in the United States.