Mr. Gallagher said visitors often approached him on his boat, where he lives and works, for impromptu free tours and conversation.

"This is not about having a legacy," he said several times during an impromptu tour of the synagogues.

Some even offer an impromptu tour or a taste of wines straight from the cask.

Last week, his mother, Lorri Sessions, 42, tried to stop an impromptu tour.

Cameras tracked the impromptu tour everywhere; the Consortium would wring every dime out of the footage.

The locktender gave us an impromptu tour, leading us across the bridge formed when the doors of the lock swing shut.

"It's a paradise for narcos here," the 32-year-old cartel veteran said as he took a visitor on an impromptu tour of the city.

The third Sunday, I met up with Iganga in a restaurant, then we wandered through the city on an impromptu tour.

Sergeant Fisher stood in a parking lot outside the Foxhole, a military surplus store, and provided an impromptu tour of his new uniform.

And the curator, James Hurd, will take you on an impromptu tour.