Tubular structures arise in the solid state through close chalcogen-chalcogen contacts. Several examples containing sulfur and selenium centers are presented. In the case of cyclic systems of ring size 22-33 the resulting tubes are capable of including pi-systems as guest molecules. For hexaselenacyclotriacontahexayne 8(5) it is shown that the cycle is flexible and adopts a smaller space in the case of furan or n-hexane as compared with that of mesitylene. This behavior is attributed to the relatively low torsional barrier at the chalcogen-substituted butadiyne unit.