Theme parks host visitors' games, watched by remote viewers (esports). Games are played on visitors' phones. A game can involve searching for clues indoors and outdoors. A game can be played at night for a live daytime audience. Parks have portals simulating sending items between parks. An item is put into a portal, copies appear at other portals. An item is put into a portal, items of other types appear at multiple portals. An item is put into a portal, a copy appears at a randomly picked portal. A portal gets an item representing a young individual (eg. kitten), an item representing an older individual (eg. cat) appears at another portal. Visitors and viewers can join teams. A team can span different parks. A portal can be controlled by a team.