A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

The United States Capitol's former columns still stand.

This quirky collection is an interactive exhibit crammed with creative contraptions and tinkered-with toys.

This unusual rock formation looks like an apple that has been neatly sliced in half.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A collection of miniature, symbolic sculptures hides in plain sight across Kyiv.

This exquisite, alienesque piece of Soviet architecture is being threatened by modern shopping malls.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

One of the largest remaining ancient burial mounds of the 10th century.

This unique Lady Liberty is one of the only examples of the figure sitting down.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

A tribute to a Ukrainian heroine who went undercover and killed several Nazi operatives.

The medieval prince founded the first library in Ukraine at Saint Sophia's Cathedral where he was interred.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.